Autoblog

It's been a few years since Audi sold diesel-powered cars in the U.S., but that's about to change. After three years of showing what diesel is capable of at Le Mans and in the ALMS, Audi will introduce a diesel-powered Q7 TDI sometime in early 2009. Before that happens, Audi wants to show America what kind of mileage its diesel lineup gets in the real world. To do so, the German automaker has assembled a fleet of 23 vehicles including the coming Q7, the Q5, A4 and A3. Currently the Q7 is the only Audi diesel announced for the U.S. although the company has acknowledged that it's considering other models. A motley collection (aren't all groupings of journalists motley?) of 184 journalists and guests from around the world have been invited to drive the fleet across the continent from New York to Los Angeles in four legs with the goal of seeing who can get the best real world mileage. Among that collection will be several members of the Autoblog and AutoblogGreen teams, including yours truly. The Mileage Marathon kicks off on Oct. 6 in Manhattan and hits the city of angels two weeks later. We'll bring you live reports from the road as we wind across the country, so stay tuned.


[Source: Audi]

While Japanese automakers have the hybrid lead, the front-runners in diesel are companies of German descent. Mercedes is bringing home the bacon with BLUETEC, BMW is slapping twin turbochargers onto a 3.0-liter diesel, and Volkswagen will implement BlueMotion into five different VWs. Audi intends to join the oil-burning club here in the States with the introduction of the 3.0 TDI, which is good for 240 HP and 406 lb.-ft. of torque. With all that twist, tires should scream from rubber-stripping takeoffs, but even aggressive driving won't translate at the pump as bad as their gasoline counterparts. Audi expects a 35-percent fuel economy bump vs. similar gasoline powerplants.

The 3.0 TDI has an ultra-low emission system in the exhaust tract, which kills NOX gas by means of a carbonic acid diamide solution, helping the diesel to meet the LEV II Bin 5 classification. That means each of the 50 states will accept the 3.0 TDI as a salable vehicle. It's hard not to get excited about an engine that takes off like it's shot out of a canon and also gets up to 40 MPG on the highway. Expect the new Audi diesel to arrive first in the Q7, and later in the A4.

Audi's press release is after the jump.

[Source: Audi]

Audi's first diesel and hybrid powertrains in the US will be launched in the Q7 next year. The power units will likely trickle down to other vehicles in Audi's range, but they're not yet offering up any details on how prolific this hardware will be. Volkswagen, Audi and Porsche have been working collaboratively to develop the parallel hybrid system, which makes the choice of the Q7 logical, as all three brands share a flavor of the architecture. Hybrid Q7s will be able to power around on the electric motor up to 31 mph, and the system will also shut down the engine during cruise conditions at speeds up to 75 mph. The total weight of the system adds 300 pounds, most of which is in the 288-volt NiMH battery pack.

The modular hybrid system will be easy to integrate with different powertrains once Audi starts propagating the system throughout the rest of their models, and terming it "modular" denotes that the basic pieces will be very adaptable. When Porsche and Volkswagen get their versions of the hybrid gear, we'd expect the engines to differ from the Q7's 3.6 liter 280 horsepower unit. Audi's claiming a 23 percent mileage improvement versus the conventional Q-ship. As for the oil burner, it will be a 3-liter V6 that is 50-state compliant while quietly thumping out 230 horsepower and 400 ft-lb of torque. Diesel torque delivery can be often be described as "electric-motor like," but we wonder if the Hybrid, with its actual electric motors, will laugh at the diesel's effort as it gets the hole shot.

[Source: Auto News - sub req.]