runs on 98 RON (premium unleaded) fuel and features a compression ratio of 12.5:1 with a bore and stroke of for a total displacement of that results in at 7,000 rpm and of torque at 6,400 rpm. The 86, BRZ and FR-S are offered with two 6-speed transmissions: an in-house developed Toyota TL70 manual gearbox (based on Aisin AI's AZ6) and an Aisin-Warner A960E automatic transmission, which is modified from that used on the Lexus IS 250. The latter uses a traditional wet torque converter design, but its software has been engineered to mimic the response of a dual-clutch transmission. The automatic transmission uses three different modes: Sport, Snow, and Normal. A torsen style limited slip differential is standard on most models. The vehicles are offered with 16" steel and alloy wheels shod with Yokohama dB Decibel E70 tyres in 205/55 size or 17" alloy wheels shod with Michelin Primacy HP tyres in 215/45 size, depending on sales market. The limited editions Toyota Racing Development (TRD) GT86 models are instead offered with 18" forged aluminium wheels, which are shod with either Yokohama Advan Sport tyres or Michelin Pilot Sport 3 tyres in 225/40 size, also depending on market. The braking systems vary between models and countries: Dual-piston front sliding calipers, single-piston rear sliding calipers, 294/290 mm ventilated disks (front/rear) - US market, EU markets, higher trim levels on most other markets Dual-piston front sliding calipers, single-piston rear sliding calipers, 277 mm ventilated disks front / 286 mm solid disks rear - lower trim levels on most other markets Four-piston front fixed calipers, two-piston rear fixed calipers, 326/316 mm ventilated disks (front/rear) - Performance Pack cars Six-piston front fixed calipers, four-piston rear fixed calipers, 355 mm two-piece / 345 mm ventilated disks (front/rear) - TRD Edition cars Suspension design comprises front MacPherson struts and double wishbones at the rear. In 2016, for the 2017 model year, the 86 was upgraded to and . The final drive ratio was lowered from 4.1 to 4.3. Design The 86's rear-wheel drive configuration and front-mounted flat boxer engine allow a low centre of gravity for strong handling characteristics. The bodywork has a . According to the 86's designers, "The goal was to create an authentic rear-wheel drive sports car with compelling style, exceptionally balanced performance and handling, flexible utility and surprising MPG." When asked about the TRD version of the car, the lead engineer Mr.