Volvo’s announcement that it is going to send the eco-version of the S80 saloon into battle with an engine that can call on just 1.6 litres of swept capacity, Volvo appears to be breaking new ground.

There’s already been a fair amount of debate on our forums as to just how lethargic the S80 DRIVe is likely to be – as the existing S80 2.0D takes 11.0 seconds to cover the 0-60mph dash with an extra 24bhp and 59lb-ft of torque, the answer is likely to be ‘very’.

But by my reckoning the S80 DRIVe will also earn itself a historical footnote as the first time such a small engine has been fitted to such a big car.

I know that as specific outputs rose through the ’70s and ’80s various E-segment cars got fitted with sub 1.8-litre engines carefully sized to qualify for tax breaks in various European countries, but I’m unaware of any getting smaller than that.