The new Mazda6 MZR-CD 2.2-litre diesel is one of the quietest engines in its segment. This ensures a driving experience that is one of the segment’s most exclusive. To achieve this quiet operation, the new engine has a very rigid aluminium-alloy block structure and this high structural rigidity is combined with a front chain-driven cassette-type counter-rotating balancer shaft to suppress booming noise and lower radiated noise, and to deliver optimised throttle pedal response and engine sound for a refined acceleration feel.
Keeping the new MZR-CD 2.2-litre diesel engine as close as possible in size and weight to the 2.0-litre was a key factor in ensuring exhilarating performance combined with good fuel efficiency and low emissions. Although the new balancer shaft and DOHC result in increased size and weight, numerous innovations to manage size and weight gain kept the increase to just 6.0kg. If the 2.2 did not have a balancer shaft, the cylinder block would have had to be 1.9kg heavier and its crankshaft 1.3kg heavier. Furthermore, the oil cooler is made of aluminium (saving 0.6 kg) and the camshaft cover is plastic (saving 1.0 kg).
On the combined cycle, the new Mazda6 diesel returns between 51.4mpg and 49.6mpg, with CO2 figures of just 147g/km to 152g/km (depending on model). All saloon and hatchback models with CO2 emissions of 147g/km and 149g/km place these cars in a highly competitive band C for vehicle excise duty whilst maintaining the same company car tax bands as the previous 2.0-litre diesel variants.
The three new diesel powertrains for new Mazda6 retain, or hugely improve, the Zoom‑Zoom, fun‑to‑drive, attributes of this popular Mazda. Acceleration to 62mph with the 2.2-litre low power 125ps diesel takes just 0.2 seconds longer than the previous 2.0-litre 140ps diesel (10.9 compared to 10.7 seconds for the hatchback), while the mid power 163ps achieves 62mph in 9.2 seconds and the high power 185ps reaches that speed in just 8.5 seconds. Every Mazda6 diesel comes with a six-speed manual transmission – fitted with a high top ratio (0.711:1) for quiet, relaxed and fuel-efficient cruising.Published 11 November 2008