VAUXHALL'S Zafira Tourer MPV will be the first model to feature the company's new generation 1.6 CDTi Start/Stop diesel engine.

The powerplant, which makes its debut at next month's Geneva Motor Show before arriving in the summer, is the first engine to be announced in a new family of four cylinder diesels.

It is Vauxhall's cleanest diesel engine ever and is equipped with something called BlueInjection selective catalytic reduction technology that meets strict Euro 6 emissions regulations.

A powerful unit delivering 136PS for a 0-60mph time of 10.4 seconds, the 1.6 CDTi can also return a fuel figure of 68.9mpg combined with CO2 emissions of 109g/km

Further expanding the Zafira Tourer's powertrain line-up, it means the range now comprises five diesels, including a new high performance 2.0 BiTurbo CDTi engine with 195PS, and two petrol engines.

SCR is an environmentally-friendly exhaust after-treatment in which a harmless diesel exhaust fluid named AdBlue, consisting of urea and water, is injected into the exhaust gas.

The solution decomposes into ammonia, which is then stored. Nitrogen oxide enters the catalyst in the exhaust gas, and is then selectively reduced to nitrogen and water.