Audi's new BiTDI engine, revealed earlier this year, is fierce: rated at 308 horsepower and 480 pound-feet of torque, it's already a likely candidate for use in the A6, A7, A8, and even the Q7. Now, it looks like it might be headed for the Q5 as well.

The twin-turbo 3.0-liter diesel engine is expected to yield very good fuel mileage numbers, too, though specifics haven't been disclosed just yet. And best of all, the engine may make it to the U.S., if previous reports prove true.

That's all well and good, but what would a Q5 with the V-6 BiTDI under the hood look like? Well, to the eyes, not much different from a normal Q5. But performance could be very brisk: 0-60 mph in 5.0 seconds (possibly less), with a 155 mph electronically limited top speed, according to AutoExpress. We'd also expect an improved suspension tune for better grip and handling.

Under the Q5 BiTDI, we would expect to see quattro all-wheel drive, larger brakes, wrapped in a somewhat more aggressive body kit--think Q5 meets S/RS treatment, through a diesel lens.

The V-6 BiTDI parade may not stop there--the smaller, nimbler Q3 could also get the engine. We already know what a high-performance Q3 RS would look like thanks to the concept shown at the 2012 Beijing Auto Show. The same basic idea with a torque-monster V-6 turbo diesel under the hood? Sign us up.

If the BiTDI engine does end up in the Q5, we would expect it to arrive sometime after 2013, perhaps not until 2014, after the first of the more mainstream Audi vehicles gets the engine. For a soundclip of the brawny diesel, click here.