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Photos Courtesy of: Official Jaguar Site - http://www.jaguar.com

Specifications:
Year: 2004
Make: Jaguar
Model: XK-RS Concept
Top Speed: 200 MPH / 321.9 KPH
0 - 60 MPH: 3.9 Seconds
Position: Front Engine
Configuration: Supercharged Jaguar AJ-V8 Trans-Am Race Engine
Valvetrain: Custom Rocketsports valve train
Displacement: 305.1 CI / 5001 CC
Power: 550 BHP / 410.1 KW @ N/A RPM
Torque: 500 FT LBS / 678 NM @ N/A RPM
HP/L: 110 BHP per Liter
HP/LB: 6.2 LBS per BHP
Fuel Delivery: Bosch fuel injection
Exhaust: Borla stainless steel headers
Drive Wheels: RWD
Curb Weight: 3400 LBS 1542 KG
Weight Dist: 50 / 50
Materials: Unit Steel
Front Brakes: Performance Brembo calipers with drilled rotors
Front Brake Size: 13.0 IN / 330 MM
Rear Brakes: Performance Brembo calipers with drilled rotors
Rear Brake Size: 12.0 IN / 305 MM
Front Wheels: 20.0 x 10.0 IN / 50.8 x 25.4 CM
Rear Wheels: 20.0 x 11.0 IN / 50.8 x 27.9 CM
Front Tires: Michelin Pilot 285 x 20
Rear Tires: Michelin Pilot 325 x 20
Front Suspension: Wishbones w/Coil-over Penske Shocks
Rear Suspension: Wishbones w/Coil-over Penske Shocks
Transmission: Manual Sequential 5-speed
JAGUAR NORTH AMERICA AND ROCKETSPORTS RACING UNVEIL THE ULTIMATE XKR AT THE 2004 CHICAGO AUTO SHOW

CHICAGO, Illinois, February 5, 2004 – The most powerful road-going Jaguar convertible ever – the 550 horsepower XK-RS concept car – was unleashed at the 2004 Chicago Auto Show today.

Developed by Michigan-based Rocketsports Racing in cooperation with Jaguar North America, the XK-RS concept demonstrates how Jaguar’s luxury GT road car can be transformed into a thundering 200-mph supercar.

"At Rocketsports, we’re very familiar with Jaguar’s XKR sports car, having won the Trans-Am Manufacturers’ Championship two times with this beautiful, fast car," said Rocketsports Racing owner, Paul Gentilozzi.

"We think the XKR makes a great foundation for high-performance tuning. The XK-RS concept is just one dramatic interpretation of the many directions in which the car can be taken," he added.

Engineers at Rocketsports’ Lansing, Michigan workshop took the already-potent Jaguar AJ-V8 Trans-Am race engine and increased its displacement by stroking it out from 4.5 liters to 5.0 liters.

To ensure drivability, the engineers reinstalled an Eaton supercharger to deliver an estimated 550 bhp and 500 lb. ft. of torque, giving the car the power to accelerate from standstill to 60 mph in under four seconds, and take it to a top speed of 200 mph.

"Many of the lessons we learned in developing the 650 bhp normally aspirated Jaguar AJ-V8 race engine for the R-Performance XKR Trans-Am race car were incorporated in the engine for the XK-RS," explained Gentilozzi.

To make the car more involving for the sports car enthusiast, the standard six-speed ZF automatic transmission was replaced with a five-speed manual transaxle. Re-positioning the driveline weight to the rear of the car also results in a perfect 50:50 weight balance for improved handling.

Rocketsports also used the team’s considerable expertise in high-speed aerodynamics with its Jaguar XKR Trans-Am race cars, modifying the production XKR’s body to ensure ground-hugging stability at very high speeds.

Special underbody air tunnels running the length of the car were created, along with deeper front and rear spoilers, wider wheel arches and aero-style sill sections similar to those featured on the specially-developed XKR that starred in last year’s James Bond adventure, ‘Die Another Day’.

When tested in the wind tunnel, the changes are expected to result in a 100 percent increase in aerodynamic downforce at top speed compared to the standard car.

The production XKR’s suspension was also modified to ensure supercar handling. The changes include the addition of coil-over high-performance Penske shocks. To give the concept the kind of stopping power that matches its anticipated grip, R-Performance Brembo calipers with drilled rotors (13-inch front/12-inch rear) were added.

And no 200 mph supercar would be complete without a dramatic wheel and tire combination. The XK-RS comes fitted with three-piece wheels - center-lock 'Machiavelli Gotti' – 20-inch x 10-inch at the front, 20-inch x 11-inch at the rear – shod with high-performance Michelin Pilot tires.

Inside, the XK-RS features body-hugging Johnson Controls "Leap" seats clad in black leather with medium grey inserts.

To complete the bold appearance, the concept is painted in rich black lacquer. Along each side, Pearl Black Jaguar ‘leaper’ graphics echo those used on Rocketsports Racing’s XKR race cars.

"The XK-RS concept is one more example of our strong relationship with Paul Gentilozzi and Rocketsports Racing," said George Ayres, vice president of Marketing for Jaguar North America. "The XK-RS uses Rocketsports’ considerable race car expertise to create this dramatic, one-off concept car."

The XK-RS is Rocketsports' second Jaguar project car. In 2002, Rocketsports created the purposeful ‘Racing Concept’ version of Jaguar’s all-wheel drive X-TYPE. The dramatic-looking concept race car was developed to test the potential of Jaguar’s X-TYPE as a project car for the enthusiast market.

Story by Jaguar
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