The biggest difference between the "XR series" performance versions and standard models were the engines; the XR6 and XR8 boasted a six-cylinder and a V8 respectively. The V8 was later upgraded to output 185 kilowatts (248 hp) in October 1997. The upgraded transmission and exhaust system were unique to the XR range, as was the exterior styling with an XR exclusive quad headlamp assembly giving the vehicle a higher degree of aggression when compared to the look possessed by the other variants. Both models came standard with limited slip differential and specially tuned suspension. Body kits were also installed to improve the aesthetics and the aerodynamics. The first series of 824 XR8 models had the engine and 3.23:1 diff ratio with 15 inch alloy wheels. The second and last of the series numbered 784 examples and was equipped with a engine, shorter 3.45:1 diff ratio, 16 inch alloy wheels, big bore exhaust headers and the late model Explorer inlet manifold as standard.