The following cars represent the most technically advanced available.
The 2014 Volkswagen Jetta TDI offers basic transportation at a bargain and an excellent engine, but techies will want to hold off for the improved 2015 model.
At the 2008 Geneva auto show, Brian Cooley takes a look at BMW's new Diesel Hybrid system on the X5: a clean-burning engine that still surprisingly packs a lot of punch.
CNET Car Tech posts video on the BMW X5 Twin Turbo Diesel Hybrid from the 2008 Geneva auto show.
Web video of the new turbocharger inside the 6.7L Power Stroke V8 Turbo Diesel.
Audi's new A4 comes with optional LED daylights, turbo-charged diesel.
A twin-turbo diesel helps the BMW X5, but how much can you really "greenify" a 5,225-pound vehicle?
Audi launched the first generation TT in the late '90s, now we're on the third generation. Take a look not only at the new one, but where it's come from.
After putting nearly 8000 miles on our Leon, like us, over Christmas it was probably in need of a long break sitting in the garage with all its body kit off drinking oil and watching 'Bullitt.'
The 2014 BMW 328d xDrive Sports Wagon combines 40+ mpg diesel efficiency, the flexibility of a wagon, and the thrills of a driver's car.
With solid cabin tech, the 2014 Chevrolet Cruze Diesel competes well with compact sedans and gets stellar fuel economy, but high initial cost and the price of diesel eat into the savings.