The new 3.0-litre V6
Audi is introducing a new top-of-the-range engine along with the launch of the new A4 generation: the V6 with five-valve cylinder head produces 162 kW (220 bhp) from 2976 cc at 6300 rpm. Its peak torque of 300 Nm is available at 3200 rpm. It consequently accelerates the A4 saloon with front-wheel drive and 5-speed manual gearbox from 0 to 100 km/h in 6.9 seconds, and on to a top speed of 245 km/h. The average fuel consumption of this version is just 9.5 l/100 km (1999/100 EC).
Apart from its basic concept, the arrangement of the cylinder banks at an angle of 90 degrees and the identical bore, the new engine shares only very few components with its 2.8-litre predecessor.
The most important innovations:
The new Audi 3.0 V6 engine is consequently not only tremendously powerful, but also one of the most modern engines of its kind.
The new 2.0-litre engine
The other newcomer in the range of petrol engines for the new Audi A4 is the inline four-cylinder engine with a displacement of 1984 cc. This engine, with five valves per cylinder, reaches its peak torque of 195 Nm at 3300 rpm.
This unit achieves its maximum power output of 96 kW (130 bhp) at 5700 rpm. It propels the A4 saloon with front-wheel drive and 5-speed manual gearbox to 100 km/h in 9.9 seconds, and on to a top speed of 212 km/h. And in view of the fact that this model only consumes 7.9 litres of fuel per 100 km (1999/100 EC), these figures certainly are impressive.
The most important technical innovations:
The 1.8 T engine
An engine version that has been tried and tested several thousand times over will also be part of the range when the new Audi A4 is launched: the 1.8 T four-cylinder turbo with 110 kW (150 bhp).
Its peak torque of 210 Nm is reached at a speed of just 1750 rpm. This hefty torque remains constant up to 4600 rpm, with the result that peak torque is always available in the most frequently used driving/speed range.
The A4 1.8 T with front-wheel drive and manual gearbox consumes just 8.2 litres of unleaded Super (95 RON) per 100 km (1999/100 EC). The A4 1.8 T's power output of 110 kW (150 bhp) helps it to a top speed of 222 km/h, and accelerates it from 0-100 km/h in a mere 8.9 seconds.
The 2.5 TDI V6
The potent 132 kW (180 bhp) engine, with four valves per cylinder, centrally located nozzles, turbocharger with electronically controlled variable turbine geometry (VTG) and ultramodern radial-piston distributor-type injection pump, represents the state of the art in TDI technology.
The 132 kW (180 bhp) TDI also has special connecting rods and pistons. These not only increase its specific output, but also enable extremely high torque. A huge 370 Nm is available in the range between 1500 and 2500 rpm - an ideal basis for excellent pulling power across a broad range and powerful acceleration even from low engine speeds.
The V6 TDI's response to pressure on the throttle, even at very low engine speeds, is also quite amazing. A substantial, perfectly respectable amount of torque is available at around just 1000 rpm.
The 2.5 TDI quattro with 6-speed manual gearbox completes the sprint from 0 to 100 km/h in 8.6 seconds and then continues to accelerate rapidly up to a top speed of 225 km/h. These performance figures qualify the A4 2.5 TDI quattro for the sports car league, yet are combined with a distinct modesty when it comes to fuel consumption: the Audi A4 2.5 TDI requires just 7.8 litres of diesel (overall fuel consumption according to 1999/100/EC) per 100 kilometres.
The new 1.9 TDI with pump-injector technology
The new top version of the four-cylinder TDI with a capacity of 1.9 litres represents a further highlight in the A4 model range. Even experienced TDI experts are still surprised by the power output of this leading-edge engine: 96 kW (130 bhp) at 4000 rpm.
However, the torque of this high-tech TDI is without doubt even more impressive: Audi's most powerful version of the 1.9-litre series mobilises 285 Nm at just 1750 rpm - a record for a four-cylinder engine.
The key technical feature of this new engine version is its high-pressure pump-injector fuel injection, which currently enables the highest pressure potential of all systems. An injection pressure of up to 2050 bar is thus possible - the perfect basis for high performance and low emissions.
Top speed and acceleration speak for themselves: with a 5-speed manual gearbox and front-wheel drive, the Audi A4 TDI 1.9 accelerates from 0 to 100 km/h in 9.9 seconds and reaches 207 km/h.
multitronic: for front-wheel-drive versions
Audi is offering the multitronic, a continuously variable automatic transmission, for the first time in this vehicle category on the new A4. This transmission is the only one of its kind in the world. The revolutionary multitronic is available for all versions of the front-wheel-drive models. This has been made possible by the fact that it is designed for an extended performance spectrum.
The multitronic can now transmit torque ratings of as much as 310 Nm. This means that even the most powerful petrol engine in the A4 series, the 3.0-litre V6 with 220 bhp and 300 Nm of torque, can be combined with multitronic.
In the multitronic, Audi has developed a continuously variable transmission which avoids the previous drawbacks of this principle and exploits all the advantages of this system in achieving optimum gearshift strategies. The big difference with the multitronic is that, for the first time, the gain in convenience is not at the expense of dynamism and operating economy. In fact, quite the opposite: most of the data for an A4 with multitronic are actually superior to an otherwise identical vehicle with 5-speed manual gearbox.