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 . 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 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