Mazda will be showcasing its next generation petrol and diesel engines at the Tokyo Motorshow next month. The engines are called the SKY-G and the SKY-D respectively for the petrol and diesel versions.

The SKY-G engine is a 2.0 litre unit with direct injection and an improved variable valve timing system which gives it a 15% fuel economy and torque advantage over the current MZR engine in the Mazda 3 2.0 Sport. Direct injection was previously found only on the turbocharged 2.3 litre engine but is now available in the ‘regular’ engines.

The Mazda SKY-D engine is a 2.2 litre unit that offers fuel economy of approximately 20% better than the current 2.2 litre diesel engine. It features a newly designed engine block that reduces mechanical friction to the level of a gasoline engine. Other features include piezo injectors and a two-stage turbocharger. It doesn’t sound like its a twin-turbo setup, but instead is probably a variable geometry turbocharger.

Mazda SKY-DriveFinally, there’s a new transmission to be unveiled. After all, an engine can only do so much – the transmission plays a big factor in minimizing transmission losses and offering an optimum gearing setup for both fuel economy and power. Mazda will be premiering the Mazda SKY-Drive automatic transmission.

It’s a 6-speed automatic with a complete redesign that significantly reduces mechanical friction, a revised torque converter and clutch with minimized slip, and an optimized lock-up mechanism. Mazda says the transmission shifts faster and provides a DCT-like feel to it, but words can only say so much – a test drive will say it all!

The Tokyo show exhibit will also feature the Mazda Kiyora concept car that was shown last year. Under the Kiyora’s hood will be a 1.3 litre version of the SKY-G engine mated to a SKY-Drive 6-speed auto. Mazda claims this combination together with technologies such as the i-stop idling stop system and regenerative braking will allow the Kiyora to travel 32km per litre of fuel on the Japanese 10-15 mode test cycle.

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