► Three-way supersaloon shoot-out
► Alfa Romeo Giulia QF vs rivals
► BMW M4 and Merc C63 to beat
It's the acid test: can the brawny new 503bhp Alfa Romeo Giulia Quadrifoglio survive a triple test against the turbocharged BMW M4 and V8-toting Mercedes-AMG C63?
CAR magazine's video review pits the three super-saloons against each other on the slippery country roads criss-crossing the foothills of south Wales.
Contributing editor Ben Barry is your guide - and there's a shock result in store.
Watch our Sports Car Giant Test 2016 video here.
Alfa Romeo Giulia QF vs BMW M4 vs Mercedes-AMG C63
Who do you think will win? The raw stats are these:
- Alfa Romeo Giulia Quadrifoglio 503bhp, 443lb ft, 0-62mph in 3.9sec
- BMW M4 Competition Pack 444bhp, 406lb ft, 0-62mph in 4.0sec
- Mercedes-AMG C63 503bhp, 516lb ft, 0-62mph in 4.0sec
Watch the comparison test in our video player above - and be sure to tell us in the comments below which c.500bhp fast compact exec you'd pick if your numbers came up...
Click here for more comparison tests by CAR magazine