LOGBOOK BMW M5
> Price £89,705 > As tested £102,825
> Engine 4395cc 32v twin-turbo V8, 591bhp @ 5600rpm, 553lb ft @ 1800rpm > Transmission 8-speed auto, switchable four/rear-wheel drive > Performance 3.4sec 062mph, 155mph (limited), 241g/km CO2 > Miles this month 1041
> Total 7799 > Our mpg 24.4
> Oicial mpg 26.9 > Fuel this month £255 > Extra costs None