Audi RS6 4.2 V8 (1997-2003, C5)

Technical Notes

With 450bhp as standard and 473bhp in ‘Plus’ trim, the RS6 isn’t exactly desperate for more power. But sheer grunt is what defines this car, and having more can hardly be a bad thing. So we up the power to a massive 516bhp, and take the torque from 413lb ft to a thumping 525lb ft. But with our usual attention to detail we also reprogram the separate gearbox ECU to make the most of the extra grunt and deliver quicker, sweeter upshifts, addressing one of the few criticisms of this stupendous machine.