6.8L Bentley’s massive twin-turbo V8 is the biggest on the Australian passenger-car market and, in range-topping Speed form, pumps out 395kW/1100Nm. ‘Standard’ Mulsannes have to make do with a paltry 377kW and 1020Nm.
6.7L Rolls-Royce sticks with natural aspiration for its biggest V12, delivering outputs of 338kW and 720Nm. Downsizing to 6.6 litres and forced induction for the rest of the range boosts power and torque to as much as 465kW and 870Nm.
6.5L Lamborghini uses screaming revs to produce 544kW and 690Nm from its big V12 when installed in the Aventador S.
Opting for the ‘entry’ Aventador drops power to 515kW but torque is unchanged.
6.4L It may be more than $600,000 more affordable than the rest of the cars here, but Chrysler’s 300 SRT still manages to make this list with its Hemi V8. The same engine also powers the Jeep Grand Cherokee SRT with 350kW and 637Nm.
6.3L Like the Lamborghini, Ferrari’s V12 proves that displacement times revs is the way to vicious outputs. In the limited-edition tdf, it manages 574kW and 705Nm without a turbo in sight.