Car companies are coming up with a lot of radical ideas. Here are ten that should go the distance, from Detroit's 2007 North American International Auto Show.
Audi's 6-liter V12 TDI Q7
The mighty diesel V12 Q7: descended from a race car
Most audacious:
Audi's 6-liter V12 TDI Q7
Armed with the state-of-the-art diesel engine that won Le Mans last year, this SUV boasts 500 hp and a mighty 737 lb ft of torque @ 1,750 to 3,000 rpm. Woof! Take that, Porsche Cayenne Turbo.

Audi's new leader, Rupert Stadler, told me at the show that the V12 Q7 was only one of many up-and-coming high-performance, high-profile vehicles in Audi's arsenal. He is counting on these standouts to significantly grow the brand's presence in America, where Audi only sold 90,116 last year (vs. BMW's 274,432).

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Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer. Morningstar: © 2018 Morningstar, Inc. All Rights Reserved. Factset: FactSet Research Systems Inc. 2018. All rights reserved. Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor's Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2018 and/or its affiliates.