What is it?
If there’s a weak link in the present Insignia line-up, it’s the 1.8-litre petrol engine: economy and emissions are lacklustre, and there’s little overtaking punch. The new turbocharged 1.4 puts that right.
For now, the 1.8 will continue to be sold alongside the 1.4 T, but even considering its price advantage of £825 we can’t see many buyers choosing this outdated engine. The Turbo matches the 1.8’s 138bhp but torque is up 14 per cent to 147lb ft and arrives lower down the rev range.
What’s it like?
Whereas the 1.8 needs hard revving to stay with its own shadow, the 1.4 turbo pulls cleanly and with purpose from low revs. Overtaking no longer demands a long straight and plenty of patience. It’s a refined unit, too, and there’s nothing strained about the engine note even at high revs.
If the new engine is the most significant change for the 2012 model year, second billing goes to the new power steering system fitted to all Insignias with a manual gearbox. It’s an electric set-up to cut emissions by doing away with a power-sapping hydraulic pump.