Toyota's updated 2009 Yaris features a new 1.33-liter engine with stop-start technology that boosts fuel economy into the 50mpg range.

On the fuel economy front, Toyota's frugal Yaris gets a bit more frugal in 2009 with the addition of a new 1.33 liter dual VVT-i engine with stop-start technology. The numbers tell the story: with the new engine, the Yaris achieves 55.4 mpg combined fuel economy and sub-120g/km emissions. We've got new video and photos of the upcoming vehicle.

The 2009 update also gives the Yaris a more distinctive face, new six-speed transmissions and Toyota's Optimal Drive. UK pricing starts at £8,585.

The new 1.33 liter engine's stop-start function allows it to shut down rather than idling, to conserve fuel during city driving. Optimal Drive consists of improvements in combustion, weight savings and friction reduction that improves the overall efficiency of the powerplant. The 100-horsepower 1.33 liter engine is shared with the iQ and Auris. The 1.0 liter VVT-i three-cylinder and 1.4 liter D-4D diesel round out the new Yaris' engine offerings. The Stop & Start system is standard with the new six-speed manual transmission.

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