Volvo’s all-aluminium Drive-E twin-turbocharged 2.0-litre diesel has already proven itself a willing and frugal engine in various earlier models, and so it is in the S90.
What it might have demonstrated here, under the bonnet of this large upmarket business saloon, was its refined side, something it struggles, at times, to do.
Idling is one of those times. After start-up, the S90’s engine settles into a rhythm that declines to disturb the cabin with much vibration, but it does seem a bit louder than the executive saloon norm. And it is.
But traditional Volvo customers looking for a well-mannered and unobtrusive driving experience will find the S90 a more agreeable car on the move.
By 50mph, the refinement deficit to that like-for-like E-Class has halved. At maximum engine revs in third gear, the S90 is actually the quieter of the two cars.