New Audi A4 allroad quattro; 37 mpg in a Diesel Version
15 February 2009
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| The A4 allroad quattro. Click to enlarge. |
Audi is introducing an allroad quattro version of the A4, featuring a choice of two diesel and one gasoline engines, all turbocharged and direct-injected; Audi drive select (intelligent handling technology), the S tronic dual-clutch transmission, and standard on-board energy recuperation system, which converts mechanical energy into electrical energy during deceleration.
The 2.0-liter TDI diesel engine uses a common-rail system with an injection pressure of 1,800 bar and delivers 350 Nm between 1,750 and 2,500 rpm, with 125 kW (170 bhp) power. The Audi A4 allroad quattro 2.0 TDI reaches 100 km/h (62.14 mph) in 8.9 seconds and a top speed of 213 km/h (132.35 mph), with fuel consumption of 6.4 L/100km (36.75 mpg US).
The 3.0-liter V6 TDI diesel 176 kW (240 bhp) and develops 500 Nm (369 lb-ft) of torque at 1,500 to 3,000 rpm. The 3.0 TDI in conjunction with S tronic propels the Audi A4 allroad quattro to 100 km/h (62.14 mph) in 6.4 seconds, and tops out at 236 km/h (146.64 mph). On average, the three-liter engine consumes 7.1 L/100km (33.13 mpg US).
The 2-liter TFSI incorporates three high-end technologies: FSI direct gasoline injection, the turbocharger, and the Audi valvelift system, which boosts pulling power by means of a variable control system. Between 1,500 and 4,200 rpm, the four-cylinder engine delivers 350 Nm (258 lb-ft) of torque to the crankshaft. Peak output is 155 kW (211 bhp).
The 2L TFSI Audi A4 allroad quattro accelerated to 100 km/h (62.14 mph) in just 6.9 seconds, and to a top speed of 230 km/h (142.92 mph). On average, it consumes a 8.1 L/100km of fuel per 100 km (29.04 mpg US).
The A4 allroad quattro features the energy recuperation system used in other production models. During deceleration, the vehicle operates with increased secondary voltage. At this point, it is able to convert the kinetic energy into electrical energy which is buffered in an absorbent glass mat battery. Whenever the sedan accelerates again, the battery feeds the energy back in, thus reducing the load on the alternator.
All three engines are Euro 5 compliant.
The 2.0 TDI is coupled to a six-speed manual transmission. The 3.0 TDI and 2.0 TFSI feature the next generation of Audi’s S tronic. S tronic features a high efficiency ratio and a broad spread of the gear ratios. The seven-speed S tronic has a fully automatic mode at the ready: the driver can shift as required, if necessary via shift paddles on the steering wheel.
In the Audi A4 allroad quattro drivetrain, the differential is in front of the clutch and immediately behind the engine. This made it possible to reposition the front axle much closer to the vehicle’s front end, in turn allowing for a long wheelbase and a better distribution of the axle loads. The benefits include steady straight-line stability, ride comfort, and driving dynamics.
The Audi A4 allroad quattro features quattro permanent all-wheel drive as standard equipment. Its purely mechanical center differential favors the rear, distributing power at a 40:60 ratio to the front and rear axle. If necessary, the quattro permanent all-wheel drive can route up to 65% to the front or as much as 85% toward the tail end.
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