The 2.0-litre diesel engine, launched a couple of years ago under Vauxhall’s optimistic Whisper branding, is a known quantity.
With 295lb ft between 1750rpm and 2500rpm, it delivers a credible amount of shove through the mid-range – enough, one would think, to easily distinguish it from the 60lb ft less put out by the 1.6-litre diesel.
Unlike that engine, the bigger unit features a two-stage turbocharger rather than variable geometry, and its response is generally very decent.
Somewhat less convincing is the level of refinement. Despite its protestations, Vauxhall’s common-rail 2.0-litre diesel has never been particularly hushed and its dull-edged but distinctive rumble carries over.
Much of the familiar resonance is segregated by low crank speeds, making its most productive phases and cruising speed volume mostly acceptable.
Stray beyond the margins, though, and you’ll find a strained, old-fashioned clatter that Vauxhall’s premium-end rivals have started to damp out.
The same manufacturers have also become better at making the performance of their four-cylinder engines seem less noticeably tapered.
