Six-cylinder and convertible models

In 1983, the new 3.6-litre Jaguar AJ6 straight-six engine was introduced along with a new convertible model called the XJ-SC. The coupé's rather small rear seats were removed in order to make space for the removable soft top, making it a strict two-seater car. The XJ-SC was not a full convertible but was a fixed profile variant with a non-removable centre targa-type structure, fixed cant rails above the doors, and fixed rear quarter windows. The six-cylinder cars can be identified by a raised bonnet centre section.

Between 1983 and 1987, the six-cylinder-engined cars were only available with a five-speed manual transmission (Getrag 265), with a four-speed automatic (ZF 4HP22) offered from 1987 onwards (along with improved fuel injection as used on the XJ40). The earlier, manual models were not imported by Jaguar into the United States, which had to wait until the facelift manual 4-litre XJS coupé and convertible became available. A V12 powered XJ-SC was introduced in 1985.

The two-seat XJ-SC targa-type model, never a great success in the marketplace, was replaced by a two-seat full convertible in 1988 which proved to be a great hit.

• Rear view (V12 HE)
• 1986 Jaguar XJ-SC targa convertible (US spec)
• Pre-facelift XJ-S (full) convertible
• Interior (convertible)
• Rear seats of a 1982 XJ-S HE coupé, showing the 2+2 seating layout
• The 5.3-litre HE V12 engine

XJ-SC

The first XJ-SC was produced on June 28, 1982, the last January 26, 1988. In all 5013 XJ-SC Cabriolets were built. These cars were different in that they had a Targa/Convertible body style with removable Targa panels over the two seater passenger compartment, similar to T-tops, plus a fabric rear section including the rear window; there was an optional hard top for the rear section. Approximately 1598 Right Hand Drive and 3416 Left Hand Drive cars built. Whilst there are a small number of the XJ-SC cars with the rear seat conversion, Jaguar Cars only ever produced one such car which was specially built for Princess Diana.^{[citation needed]} The rear roof section on this car was fully secured in place and could not be removed. This conversion was later carried out by several aftermarket companies on owners cars, not with the approval of the works.

Hess & Eisenhardt convertible

From 1986, a full convertible version was available through some dealers, modified by Hess & Eisenhardt in the USA. The Hess & Eisenhardt coachbuilding firm was located in Ohio, USA, and built convertible modifications for the XJ-S under contract from Jaguar, before the official Jaguar-built XJ-S full convertible became available in 1988.

The Hess & Eisenhardt convertible differed from the later Jaguar-built XJS convertible as its un-padded top folded down deeper into the body structure of the car resulting in a cleaner rear profile when the roof was lowered. To accommodate this design element, the Hess & Eisenhardt convertibles have two separate fuel tanks, positioned to allow for the roof to fully retract. The process of converting the stock Jaguar XJS coupé into the H&E Convertible included the post-production removal of the roof, cutting the body in several sections, the addition of steel reinforcements behind the driver's seat, and 9.1 kg (20 lb) weights placed just behind the headlights to eliminate harmonic resonance caused by the significant modifications to the car. H&E XJS convertibles are easily identified by the lower folding top, as well as two small badges located just behind the front wheels. The later Jaguar full convertible had a heavier padded top that did not fold as low as the H&E convertible, but retained nearly all of the original components of the coupé.

The number of H&E Jaguar XJS produced is unknown, partly because a fire at the Hess & Eisenhardt factory destroyed most of the records pertaining to the Jaguar XJS conversions. According to some sources, a total of 2,100 cars were converted.^[12]

Police demonstrator

In 1984, a Jaguar XJS with a 3.6l engine and manual transmission was converted by Jaguar Special Vehicle Operations into a Police Special demonstrator vehicle, fitted with a police lightbar on the roof, a police radio in the centre console and plastic interior trim including cloth seats to replace luxury furnishings. The Police Special XJS demonstrator was loaned by Jaguar to a number of police forces across the United Kingdom, including the Warwickshire Constabulary, Greater Manchester Police and the Metropolitan Police, however no orders resulted from the trials due to a lack of interior space for traffic police equipment or for passengers. After retirement from demonstration services, the XJS was first donated to the Greater Manchester Police Museum before later being handed to the Jaguar Daimler Heritage Trust, with whom it would become an exhibit vehicle at the British Motor Museum in Gaydon, Warwickshire.^[13][14]

XJR-S

From 1988 to 1993, a special high performance XJR-S version equipped with the 5.3 litres (5,344 cc) HE V12 engine was produced by the newly formed JaguarSport, a separate company owned in a ratio of 50:50 by Jaguar and TWR Group Limited specialising in developing high performance Jaguar sports cars. The car had a distinctive body kit, special 15" alloy wheels, 235/60R15 Pirelli P600 tyres, a unique suspension system utilising modified coil springs and Bilstein shocks, a luxurious interior with Connolly Autolux leather along with walnut wood trim, and handling improvements. The first 100 of these cars were named "Celebration Le Mans" to commemorate Jaguar's 1988 win at the 24 Hours of Le Mans and were only sold in the UK. Between 1988 and 1989, a total of 326 XJR-S cars were produced with the 5.3 litres (5,344 cc) engine which has a power output of 318 hp (237 kW). After September 1989, the displacement of the engine was increased to 5,993 cc (6.0 L) and it was now equipped with Zytek fuel injection and engine management system. This was different from the standard 6.0-litre engine used in the late XJS models and was unique to this model. The power output was raised to 333 PS (328 hp; 245 kW) at 5,250 rpm and 495 N⋅m (365 lb⋅ft) of torque at 3,650 rpm due to a higher compression ratio of 11.0:1, a new forged steel crankshaft, increased bore and forged alloy pistons. A modified air intake system and a low loss dual exhaust system was also standard on the model. The engine was mated to the 3-speed GM400 automatic transmission utilising a recalibrated valve body and had faster shift times. The car was equipped with 16" Dunlop D40 M2 tyres for better grip. These modifications resulted in a top speed of 260 km/h (160 mph). During a comparison test conducted by Motorsport magazine in 1997, the XJR-S outperformed the other competitors which included a BMW 850i, Porsche 928 GT and a Ferrari Mondial.^[15][16]

A total of 787 coupés and 50 convertible cars were built for the world market. In the United States, to commemorate the XJ220 launch in 1992, a limited number of 100 XJR-S coupés and convertibles were produced. Based on the facelift model, these were for the American market only. These included 22 Signal Red coupés, 22 Signal Red convertibles,^[17] 22 Jet Black coupés, 27 Jet Black convertibles, 2 Flamenco Red coupés, and the Silver Frost 'Press Cars' of 4 coupés and 1 convertible.^{[citation needed]}

Daimler

Jaguar considered a luxury Daimler version to be marketed as the Daimler-S, notably without the buttresses and with only a single prototype built in 1986.^[18] Paul Banham did produce some custom notch back coupés without buttresses, larger rear side windows, and a narrow C-pillars. In the mid-90s, Banham also made a reworked version called the XJSS based on the XJS.

Lynx Eventer

A number of XJS's were modified by coachbuilders Lynx to create a three-door shooting brake, marketed as the Lynx Eventer. Records suggest that 52 pre-facelift XJ-S, and 15 post-facelift XJS, were adapted, with 18 being left hand drive and 49 being right hand drive.^[21]

Lister-Jaguar XJS

In 1986, the newly-formed Lister Cars, under the leadership of engineer Laurence Pearce, began offering a high performance package for the Jaguar XJS. The cars were sold as Lister-Jaguar and 90 customer cars in total were converted. Lister teamed up with two manufacturers namely WP Automotive and BLE Automotive to carry out the conversion process. The standard package included increased engine displacement to 7.0-litres, a modified fuel injection system with four additional injectors and throttle bodies, larger engine valves along with connecting rods manufactured by Cosworth, a new crankshaft, new cylinder heads, new inlet and exhaust valves, new bearing caps, and a new body kit featuring a spoiler at the rear with a modified rear light clusters and flared wheel arches to accommodate the wide tyres. The modified suspension system featured Koni dampers having 30% stiffer rebound than the original and having a modified rear subframe arrangement with wishbones and radius arms relocated to provide greater triangulation and reduce axle tramp. The new shocks were 100% stiff at the front and 50% stiff at the rear. The braking system had ventilated brake discs and were moved outward for better cooling and stability. The interior was also modified and now had Recaro racing bucket seats and a new steering wheel with optimised feedback. The modified engine was rated at 370 kW (496 hp) and 678 N⋅m (500 lb⋅ft) of torque. The engine was mated to a 5-speed Getrag manual transmission. The cars were fitted with 17-inch wheels with wide Pirelli tyres measuring 10-inch at the front and 13-inch at the rear. Performance figures include a 0-97 km/h (60 mph) acceleration time of 4.5 seconds and a top speed of 322 km/h (200 mph).^[22][23]

Some customers further got their cars modified with the addition of the Le Mans package. The package included a 6-speed Getrag manual transmission, a new exhaust system and twin-superchargers over the standard package applied in order to extract a power output of 450 kW (603 hp) from the engine.^[22][24][25]

XJS Monaco

Under license from Jaguar build by Paul Bailey Design. The Sultan of Brunei is said to have purchased two of the 11 cars completed.^[26][27]

Tom Walkinshaw Racing

In 1982 Tom Walkinshaw's TWR had entered a team of the V12 XJS' into the European Touring Car Championship, the cars built to the FIA's Group A touring car rules. The XJS won its first race that season when Walkinshaw and Chuck Nicholson won the XIV Grand Prix Brno, the cars simply proving too fast for their rival BMW 530/530i and Alfa Romeo GTV6 opposition with Walkinshaw qualifying 5.37 seconds faster than anyone else on the 10.925 km (6.789 mi) Brno Circuit. After more victories for the team's Jaguars in 1983 (including lapping the 20.81 km (12.93 mi) Nürburgring Nordschleife circuit in 7:56.00), the TWR Jaguars were the cars to beat in the ETCC, with Walkinshaw claiming the 1984 ETCC Drivers' Championship. During the championship season the TWR Jaguar team also won the prestigious Spa 24 Hours race with an XJS driven by Walkinshaw, Hans Heyer and Win Percy, proving not only the speed of the cars but the reliability of the 5.3 litre V12 engine. By 1984 the TWR Jaguars had a new challenger in the ETCC. The turbocharged Volvo 240T run by Eggenberger Motorsport arrived on the scene and had the speed to match the V12, though with turbocharging new to touring car racing it took a number of races for reliability to match the cars' speed.

By the end of 1984 the TWR developed V12 engines in the XJS were rated at approximately 336 kW (451 hp).

By 1985 the XJS had been retired from European competition and TWR was committed to running the 3.5L V8 Rover Vitesse in the ETCC. Walkinshaw had been to the 1984 James Hardie 1000 at the Mount Panorama Circuit in Bathurst, Australia, to co-drive a locally developed Australian Group C XJS with Australian driver John Goss. Walkinshaw qualified in provisional 7th place with a 2:16.09 lap of the 6.172 km (3.835 mi) circuit, recording a top speed of 180 mph (290 km/h) on the 2 km long Conrod Straight, with the promise of more to come in the "Hardies Heroes" Top 10 runoff through the use of special tyres. However, the tyres failed to arrive at the circuit in time and Walkinshaw eventually qualified 10th having to use front wheels on the car as no suitable rubber was available. Clutch failure saw the car fail to get off the start line and a helpless Walkinshaw was hit from behind by a Chevrolet Camaro Z28, causing the car's instant retirement and the race's first ever restart after the track was blocked at the start/finish line.

The Scot was determined to come back in 1985 and win the race in the first season of Group A in Australia and in 1985 the three TWR XJS Jaguars were brought out of retirement for the James-Hardie 1000. The cars were clearly the class of the field, finishing Hardies Heroes in 1st (Walkinshaw/Percy in #8), 2nd (Jeff Allam/Ron Dickson in #9) and 6th (Goss/Armin Hahne in #10). This time the cars got off the start line and Walkinshaw and Percy dominated most of the race, only losing the lead to the Goss/Hahne car during pit stops (the Allam/Dickson car went out on lap 3 with engine failure). The drivers of the #10 car, who had to battle a broken seat which was held loosely in place by straps and cable ties for well over 100 laps, sat in second most of the way until a split oil line late in the race cost the Walkinshaw/Percy car 3 laps and any chance of victory. 1974 Bathurst 1000 winner Goss won his second "Great Race" while Hahne, who had won the Group A category in the 1984 race driving a TWR Rover, maintained his 100% record with his only Bathurst 1000 win. After having the oil line replaced, Walkinshaw resumed in 4th place but easily caught and passed the JPS Team BMW 635 CSi of 1985 Australian Touring Car Champion Jim Richards in the last laps to make it a Jaguar 1–3, with Walkinshaw following Goss across the finish line in a formation finish.

The TWR XJS Jaguars were next seen late in 1986 at the Fuji 500 in Japan in what was meant to be its Group A swansong as it ran out of FIA homologation in at the end of the year. Against old foes in the BMW 635 CSi and Volvo 240T, as well as newer Group A cars such as the Australian Holden VK Commodore SS Group A V8 and the turbocharged Nissan Skyline DR30 RS, Walkinshaw qualified the XJS on pole, proving how competitive the car could still be in Touring car racing (the cars had been entered in the 1986 Bathurst 1000 and had undergone testing and development which gave a reported an extra 37 kW (50 hp), though the car ultimately did not race due to a lack of funding from Jaguar Rover Australia to help with freight costs). The Fuji race saw the Walkinshaw/Percy car lead the race until retiring on lap 6 with no oil pressure after easily holding off the 313 kW (420 hp) Holden Commodore of Peter Brock on the circuit's 1.5 km (0.93 mi) main straight, while the Hahne/Denny Hulme/Walkinshaw car only lasted until half distance before retiring with a broken differential.^[29]

Despite not being eligible for Group A racing in 1987, TWR ran their two Jaguars in the 1987 (January) Nissan Mobil 500 in Wellington, New Zealand under special invitation from the race promoters. Neither car finished with Walkinshaw/Percy suffering diff failure and the Hahne/Hulme car cutting a tyre resulting in a race ending crash after fighting their way into the lead. The cars then raced at Pukekohe, with Percy/Hahne giving the big cat a second-place finish in its final race behind the Perkins Engineering Holden Commodore VK of Australian drivers Larry Perkins and David Parsons.

TWR built a total of 7 cars.^[30]

Non TWR

Australian privateer Garry Willmington ran an XJS in the 1985 and 1986 Australian Touring Car Championships, and also the late season endurance races. While he reportedly had obtained more power from the V12 than TWR, Willmington didn't have TWR's resources to develop either the car or engine reliability and results were not forthcoming, though on occasions where the track had a long enough straight (such as Sandown Raceway in Melbourne or the Adelaide International Raceway), the Willmington Jag was usually the fastest car in a straight line. John Goss also ran his own privately entered XJS in the 1986 James Hardie 1000 after Jaguar-Rover Australia pulled its backing of the proposed TWR return to Bathurst due to a severe downturn in the Australian car market forced him to defend his crown alone, though he did receive some technical assistance from TWR. Electrical problems in the race saw Goss finish 24th with veteran Australian driver Bob Muir.

Today the XJS continues to be extensively campaigned in club level motorsport both in the United Kingdom and overseas. Best known of the race series is probably the Jaguar Enthusiasts' Club XJS championship, currently in association with Toyo Tires. Their championship has now been running for over a decade, offering an affordable entry into club motorsport in the UK, and continuing to attract large grids of this unlikely racing car. Cars compete in various states of modification, from barely modified road cars through to full race-specification cars built in homage to the great TWR specials.^{[citation needed]}