Sunday, December 11, 2011

Subaru BRZ sports car debuts in production form



By lowering the engine, Subaru was able to lower everything on the BRZ, from the roofline and the hood to the seating position for the driver and passengers.

200 hp it's strong but not a muscle car by any stretch, nor is it a supercar. It is a sports car in the old sense of being lightweight -- 2,700 pounds -- and it's delightful to drive. 

Subaru has long touted the low center of gravity benefits of its flat-four boxer engine, and the BRZ gets a boxer, too, an all-new "FA" 2.0-liter naturally aspirated four.

The powerplant has its own block, head, connecting rods and pistons. High performance also means a 7,450-rpm redline, 12.5:1 compression ratio and roller rocker valve train



It has a square 86-by-86-millimeter bore and stroke, and Toyota's D4S fuel injection. Under low loads it runs an Atkinson cycle to increase fuel efficiency. The torque hits 150 lb-ft at 3,000 rpm and again from 5,000 rpm to 7,000 rpm. There is no room for a turbocharger, Subaru says.

The engine will come mated to your choice of a short-throw manual or an Aisin automatic with manual, sport and normal modes. Both have six speeds. A Torsen limited-slip diff will ride out back, managing slip to the rear-drive wheels.
The electronic power steering operates on a 13:1 ratio and is controlled through a 14.4-inch wheel. Subaru says electric power steering was chosen "for feel and efficiency." Subaru says all joints and attachment points are "very rigid, very stiff to ensure communicative steering."


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