Downsized engines could struggle to pull their weight in real-world testing

Mazda is confident that ‘rightsizing’ of its engines will prove a sound investment when it comes to meeting real-world performance and efficiency tests.

One of the top selling variants of its CX-5 SUV utilises the SKYACTIV-D 2.2-litre turbo diesel engine, a comparatively larger cubic capacity than many competitor platforms. Today, it is common for a European SUV or large crossover to feature a downsized diesel unit of between 1.6- and 2.0-litres, and