The phrase "exhaust roar" refers to the loud noise made by the engine's exhaust system of a vehicle, usually when it is revving or accelerating quickly. Full definition
In Sport or Sport + mode there's a welcome increase in exhaust roar but it's not instantly recognisable as a V6 engine. (evo.co.uk)
The best hypercars ever to devour a runway like a jet fighter, collect an Abu Dhabi speeding ticket or rattle an expensive Kensington mantelpiece with a 2 am exhaust roar... (evo.co.uk)
It's an honest, energetic powerplant, with a breathy exhaust roar similar to an old Megane RS and no hint of electronic fakery to the induction rort. (evo.co.uk)