Imagine, if you will, a compact rear-wheel-drive hatchback that runs from 0-62mph in a very respectable 6.9 seconds. Not too shabby. Now imagine that this same car could average 45 mpg (US)! Not possible, you say? Au contraire! In other parts of the world where they don't just use gasoline to power cars, this is not an unheard-of possibility. One shining example is the BMW 123d, which was launched in Europe last year. Powered by a twin-turbocharged 2.0L four-cylinder diesel cranking out 204hp and 295lb-ft of torque, the 123d scores 45mpg (US) on the EU combined test cycle. For now at least, BMW isn't offering American consumers any of its four cylinder engines, but fuel system supplier Bosch has a fleet of European diesel vehicles that they use for promotional purposes. AutoblogGreen has previously tested the Smart ForTwo, Chrysler 300, and BMW 535d from this fleet and will soon be getting its paws on the three newest additions to the fleet. One of those cars is the 123d that you see above. Reader Typhoon5000 spotted this one in Flint MI the other day and shared some photos with us. Stay tuned for full reviews of this 123d and two other really cool diesels that you (unfortunately) can't buy. Thanks to Typhoon5000 for the tip and photos.