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Toyota 8NR-FTS 1.2L Turbo Engine Detailed

With the 2015 Toyota Auris facelift, the Japanese introduced their second turbocharged motor after the 2-liter turbo four-banger available on the Lexus NX 200t. This time around, we are talking about a new 1.2L force-fed engine, also known as the 8NR-FTS.
Toyota 8NR-FTS 1.2L Turbo Engine 6 photos
Toyota 8NR-FTS 1.2L Turbo EngineToyota 8NR-FTS 1.2L Turbo EngineToyota 8NR-FTS 1.2L Turbo EngineToyota 8NR-FTS 1.2L Turbo EngineToyota 8NR-FTS 1.2L Turbo Engine
Displacing just 1,196 cc and with a compression ratio of 10.0, the Toyota 1.2-liter turbocharged inline-four is good for 116 PS (114 HP) between 5,200 and 5,600 rpm. In terms of grunt, we’re offered with 185 Nm (136 lb-ft) of torque from 1,500 to 4,000 rpm. Neat!

Described with pompous words such as “drastically improved thermal and fuel efficiency,” the Toyota 8NR-FTS 1.2-liter direct-injection turbo engine uses a single-scroll turbocharger. Thanks to this layout, the brand from the Land of the Rising Sun is promising adaptive intake cooling that isn’t at all affected by the four-cylinder mill’s thermal load.

Fuel economy? On average, the 2015 Toyota Auris facelift with the 1.2L promises to return an impressive 4.7 l/100 km, which translates to 50 US mpg and 60 UK mpg, respectively. In terms of combustion speed, engineers employed what Toyota calls a vertically-rotating swirl inside the cylinder. Together with the D-4T direct-injection turbo technology, this ensures plenty of torque across a wide rpm range for a petrol engine.

Additionally, the 8NR-FTS is up to 36 percent thermally efficient, granting it a leading level among mass-produced gasoline engines. Last but certainly not least, the continuous variable valve timing on the intake (VVT-iW) ensures that the engine uses the Atkinson Cycle by adjusting the valve timing according to load. Atkinson what now, you’re asking? That’s the combustion cycle in which thermal efficiency is enhanced by making the expansion ratio larger than the compression ratio. As such, you improve fuel efficiency.

press release
 
 
 
 
 

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