There’s some wind noise on the motorway – that’s inevitable for such a large, upright car – but the disturbance is limited to a gentle flutter around the door mirrors and front pillars. Versions on 20in wheels don’t suffer from much road noise, either, although you hear more in cars fitted with 21 and 22in alloys.
There’s little to choose between the SDV6 and the SDV8 when it comes to engine noise. Both diesel engines are smooth at low revs and when cruising, and remain well mannered even when worked hard. The SDV6 Hybrid can be driven in electric-only mode, so ought to offer some low-speed refinement advantage, but in reality the engine is seldom off for long enough when the car is moving to make much of a difference.
The V6 petrol is quiet provided you stick to lower revs, but let it spin up towards the red line and it gets very vocal, emitting quite a harsh, flat engine note that not everybody will find particularly likeable.
Both V8 petrol versions have extravagant engines with loud soundtracks to match (the high-performance SVR is especially thunderous), and while they can be more muted when driven gently, they certainly announce themselves when driven hard. Still, both are performance engines rather than silky luxury ones, and the soundtrack is a big part of the engines’ appeal.
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