外媒近日曝光了718 Boxster和718 Cayman两款车搭载的2.0和2.5升涡轮增压引擎细节，这两款车将于明年发布。其中718 Boxster搭载了一台内部编号为“9A2B4T”的水平对置四缸引擎。它采用单涡轮，最大功率220千瓦/300马力，扭矩349牛米，引擎转速红区略微超过7400转/分。至于Boxster S和Cayman S则搭载2.4或2.5升排量引擎，功率约为265千瓦/360马力，扭矩400牛米。该引擎配备的涡轮增压器采用了取自911 Turbo的可变几何涡轮。据718动力系统开发主管Matthias Hofstetter透露，这台引擎前部的两个气缸换成了涡轮增压器。Boxster搭载了这台改进后引擎，车重从原来的1309公斤增至1400公斤，但性能也获得提升。Boxster标准版百公里加速时间为5.5秒，而Boxster S为5秒。由于引擎排量降低，燃油经济性也获得提升，百公里油耗下降了1升。这两款车很可能会在明年3月的日内瓦车展首次亮相。

 

Porsche 718 2.0 and 2.5 turbo engines detailed

The Porsche 718 Boxster and 718 Cayman due next year will be offered with newly developed 2.0 and 2.5 turbocharged gasoline engines.

 

Autocar had the opportunity to take the 718 Boxster for a quick spin and managed to find out it will have a flat-four unit codenamed “9A2B4T.” It has a single turbo and is capable of developing approximately 300 hp (220 kW) and 258 lb-ft (349 Nm) of torque, with the redline set at a little over 7,400 rpm.

 

As for the Boxster S and Cayman S, the engine in these two will have a 2.4- or 2.5-liter displacement and power will stand at around 360 hp (265 kW) and 295 lb-ft (400 Nm). The turbocharger in this engine could use Porsche's proprietary Variable Turbine Geometry (VTG) as implemented in the 911 Turbo.

 

According to Matthias Hofstetter, head of 718 powertrain development, engine packaging was a bit tricky. Ultimately, the job was done after the two front cylinders of the old engine were replaced by the turbocharger. The engine modifications have brought a bump in weight for the Boxster from 2,888 lbs (1,309 kg) to 3,086 lbs (1,400 kg), but even so performance is great. The standard Boxster model jumps to 62 mph (100 km/h) in 5.5 seconds whereas the Boxster S needs just 5 seconds. Thanks to downsizing, fuel efficiency has increased by about 4 mpg (1 liter / 100 km less than before).

 

Both models will be revealed early next year, with a public debut likely to take place in March during the Geneva Motor Show.