Can a modern diesel engine thrash an older petrol engine when it comes to performance? Watch as we line up our diesel 2017 Volvo V90 D5 against a petrol 1996 Volvo 850 T5 in a drag race and rolling race. Will 20 years of development leave the 225hp 850 eating the 235hp V90’s dust? Or can petrol power always trump diesel? There’s only one way to find out… race!