New Vauxhall CorsaThe new Vauxhall Corsa is to offer an all-new 1.0-litre three-cylinder turbo petrol and a diesel engine capable of averaging almost 88mpg combined, the British firm has announced.

That frugal new 1.3-litre CDTi 95 fuel-miser will also pass the Boris Johnson test, Vauxhall has confirmed: because it is Euro 6 compliant, future owners will not have to pay the London Mayor’s proposed £10 Congestion Charge tax for dirty diesels.

Vauxhall is revealing technical highlights of the new Corsa ahead of the car’s world debut at the Paris Motor Show 2014 in October. Despite the diesels offering CO2 emissions as little as 85g/km, the new 1.0-litre ECOTEC engine will be the key draw, particularly given rival Ford’s success with its own 1.0-litre EcoBoost three-cylinder turbo.

Vauxhall’s new engine offers either 90hp or 115hp, and the higher-power version accelerates to 62mph from rest in 10.4 seconds. The 90hp engine can average nearly 55mpg on the consumed cycle.

Today’s lethargic 1.2-litre and 1.4-litre engines will remain on sale despite the arrival of the 1.0-litre, adds Vauxhall: they too have been recalibrated to be Euro 6 compliant.

Top tech for new Vauxhall Corsa

Vauxhall has revealed some spec surprises for the new Corsa. All models, for example, will come with a heated windscreen, plus Hill Start Assist and a tyre pressure monitoring system.

Bi-xenon headlights will be available, as will a blind spot alert system, rear view camera, forward collision warning system and an ‘Opel Eye Camera’ that can read road signs. Most engines, including all diesels, will also come with engine stop-start, thus escaping another proposed diesel driver tax.

All but entry level models will feature the Vauxhall IntelliLink infotainment system that’s familiar from the Adam. Its 7-inch touchscreen offers smartphone connectivity, voice control and Siri Eyes Free access.

It will also bring apps to Vauxhall’s crucial new supermini, including low-cost BringGo navigation and TuneIn internet radio.

Prices for the new Corsa will be announced during press day for the Paris Motor Show 2014 on 2 October (we’d guess from £10,000 for the 1.2 three-door); production begins later in 2014.