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2012 Audi A8 Hybrid


The power of a six-cylinder model, the fuel consumption of a four-cylinder version: Audi will be starting series production of the A8 hybrid in 2012. Its gasoline engine - a 2.0 TFSI - and an electric motor develop peak output of 245 hp and 345 lb-ft (480 Nm) of torque. Average fuel consumption is below 6.4 liters per 100 km (36.75 US mpg). The sedan can travel at speeds of up to 60 mph on electric power alone, and cover around 2 miles (3 kilometers) with zero local emissions at a constant speed of 37 mph (60 km/h). (continued below)

2012 A8 Hybrid Photo Gallery
2012 Audi A8 Hybrid

Audi A8 Hybrid: Low Fuel Consumption in the Top Class

Source: Audi | Published: Wed Aug 24, 2011

(continued from above)

The Audi flagship model is designed as a highly efficient parallel hybrid. The 2.0 TFSI, which has been modified in some areas, generates an output of 211 hp and 258 lb-ft (350 Nm) of torque, which is available between 1,500 and 4,200 rpm. The combustion engine works together with a disc-shaped electric motor which develops 54 hp and 155 lb-ft (210 Nm).

The permanent magnet synchronous motor is mounted in the space usually occupied by the torque converter in front of the modified eight-speed tiptronic. A multi-plate clutch that operates in an oil bath connects or disconnects the electric motor and the TFSI engine. The clutch operates ultra-precisely and gently in all situations. The highly comfortable and fast-shifting hybrid transmission guides the torque to the front wheels; with its wide gear spread it contributes to the efficiency of the Audi A8 hybrid.

The short-term system output of 245 hp (180 kW) and the system torque of 345 lb-ft (480 Nm) ensure highly agile performance. The Audi A8 hybrid reaches 60 mph in 7.4 seconds from a standing start and has a top speed of 146 mph (235 km/h). Its fuel consumption in the EU cycle is less than 6.4 liters per 100 km (36.75 US mpg), and CO2 emissions are below 148 grams per km (238.18 g/mile).

The Audi A8 hybrid can drive at up to 60 mph purely on electric power and has a range of up to two miles (three kilometers) at a constant 37 mph (60 km/h). This gives the driver the choice of three modes: The EV characteristic map gives priority to the electric drive, while the D mode efficiently controls both the engine and the electric motor. The S mode and the tiptronic gate are designed for a sporty driving style. The hybrid sedan has five operating states: with the TFSI engine alone, with electric drive only or in hybrid mode; recuperation and boosting are also possible. Two displays show the driver all operating modes in detail.

The lithium-ion battery, which weighs 81 lb (38 kilograms), is located in a crash-proof area in the trunk. It provides 1.3 kWh of nominal energy and up to 40 kW of power. Two different methods are used to air-cool the battery, depending on need: with air blown from the passenger compartment by a fan and via a separate cooling circuit coupled to the automatic air conditioning system. The battery is thus kept within the temperature window required for it to perform to its full potential over a wide range. The electric motor and the compact power electronics which serve as a controller between the electric motor and the battery are water-cooled.

In visual terms, the Audi A8 hybrid is distinguished by subtle details. The ten spokes of its alloy wheels - which have a diameter of 18 inches as standard and 19 inches as an option - are reminiscent of turbine blades. The body features hybrid badges, and Arctic Silver is available as an exclusive paint finish. The metallic paint finish, three-zone automatic air conditioning, LED headlights and the BOSE sound system come standard.

Thanks to the brand's ultra-lightweight construction expertise, the Audi A8 hybrid will be one of the lightest sedans in its category. Its ASF (Audi Space Frame) body is made entirely of aluminum, while the B-pillars are of hot-shaped, ultra-high-strength steel. Weighing just 509 lb (231 kilograms), it is roughly 40 percent lighter than a comparable steel construction.

Specifications
Key: AT - automatic transmission, MT - manual transmission, F/R/AWD - front/rear/all wheel drive
Powertrain
Type I4, Turbocharged + Electric Motor
Displacement 121 cu in (1984 cc)
Power 211 hp
Torque 155 lb-ft
Redline n/a
Electric Power 54 hp
Electric Torque 155 lb-ft
Driveline All Wheel Drive
Transmission 8 Speed Automatic
Brakes & Tires
Brakes Front - Rear Ventilated Discs - Solid Discs
Tire Size Front - Rear R18 (Std.)
  R19 (Opt.)
Exterior Dimensions & Weight
Length n/a
Width n/a
Height n/a
Curb Weight n/a
Performance
0-60 mph 7.4 s
1/4 Mile n/a
60-0 Braking n/a
Top Speed 146 mph
Fuel Economy
EPA Fuel Mileage - City/Highway n/a
Origin & Price
Origin Germany
Base Retail Price (MSRP) n/a

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