Audi will debut two new fuel-efficient variants of its A4 and A3 models at the 2009 Frankfurt Motor Show.
Audi took its 3.0 TDI clean diesel engine from the Q7 and dropped it in the new, best-selling A4. The new common-rail injection diesel engine, mated to 6-speed triptronic and quattro system, allows the A4 3.0 TDI to average an outstanding fuel-economy of 35 mg. 0 to 62 mph takes just 6.2 seconds with a top speed of 155 mph.
The new A3 models will get a new turbocharged gasoline engine featuring a lower displacement. The 1.2 TFSI 4-cylinder engine makes 105-hp with a maximum torque of 129 lb-ft. It allows the A3 to go from 0 to 62 mph in 11.1 seconds (Sportback in 11.3 seconds). While that may the most boring thing in the world, the A3 1.2 TFSI averages a fuel-economy of 43 mpg.
Sales of the A3 and A3 Sportback 1.2 TFSI will begin in the first quarter of 2010. The new engine will be available with front-wheel-drive and a 6-speed manual transmission.
Click through for the press release.
Extremely clean: Audi A4 3.0 TDI clean diesel quattro
Audi debuted the 3.0 TDI clean diesel engine in its large Q7 SUV; now, the world’s cleanest diesel technology will also be available in the best-selling A4.
A package of technologies boasts an array of innovative solutions for engines and the after-treatment of exhaust gas.
At the engine, a new common-rail injection system (which generates up to 2,000 bars of pressure), innovative pressure sensors in the combustion chamber, and an especially high-performance exhaust recirculating system collectively ensure a highly efficient and low-emission combustion process. A novel DeNOX catalytic converter, integrated within the end of the exhaust system, reduces residual nitrogen oxides. Just upstream of it, a pump injects an additive named AdBlue into the hot exhaust flow; there, this aqueous solution decomposes into ammonia – which splits the nitrogen oxides into nitrogen and water.
The A4 3.0 TDI clean diesel quattro already complies with the emission limits of the EU’s Euro 6 standard, expected to become law in 2014. It is also very fuel-efficient, averaging only 6.7 liters (Avant: 6.8 liters) of fuel per 100 km (35.11 and 34.59 miles per U.S. gallon). And this TDI engine is indeed a powerful performer, needing only 6.2 seconds (Avant: 6.3 seconds) to go from zero to 100 km/h (62.14 mph). Top speed is electronically governed to 250 km/h (155.34 mph).
In conjunction with a six-speed tiptronic and quattro permanent all-wheel drive, this vehicle guarantees a high degree of comfort and superior traction.
Efficient Downsizing: Audi A3 and A3 Sportback 1.2 TFSI
Downsizing is a cornerstone of Audi’s efficiency strategy – and Audi is relentlessly committed. The A3 model line will soon introduce yet another turbocharged gasoline engine featuring lower displacement. It unites maximum performance with minimum consumption.
Designed from scratch, the new 1.2 TFSI generates 77 kW (105 hp) from a displacement of 1,197 cm3 (73.05 in3). And as is typical of Audi, turbocharging and direct gasoline injection once again perfectly comprise a technological one-two punch. Thanks to an aluminum crankcase, this four-cylinder engine weighs just 89.5 kilograms (197.31 pounds); this remarkably low weight also boosts its efficiency.
The 1.2 TFSI has been optimized to minimize friction. Eight valves are actuated by a single camshaft. A common-rail system injects the fuel. An electric control valve operates the turbocharger’s wastegate valve; boost pressure builds up spontaneously and scavenging losses drop.
This small engine generates 175 Nm (129.07 lb.-ft.) of torque between just 1,500 and 3,500 rpm. It propels the three-door A3 1.2 TFSI from 0 to 100 km/h (0 to 62.14 mph) in 11.1 seconds; the Sportback, in 11.3 seconds. Both versions reach a top speed of 190 km/h (118.06 mph) and, on average, consume just 5.5 liters of fuel per 100 km (42.77 mpg) – emitting just 127 grams of CO2 per kilometer (204.39 g/mile).
Sales of the A3 and A3 Sportback 1.2 TFSI will begin in the first quarter of 2010. The new engine will initially be paired with front-wheel drive and a six-speed manual transmission.
– By: Kap Shah