Want to know which cars have the slipperiest shapes? Look no further than luxury sedans. Like the forthcoming new BMW 3 Series, which – as the automaker has now revealed – boasts a drag coefficient of just 0.23.



That may not make it the most streamlined vehicle hitting the market, but it's pretty darn close, with just a tenth more drag than the new Mercedes A-Class sedan. BMW's figure ties the slipperiness of the Tesla Model 3's shape, and bests the Model S' 0.24. The only BMW more streamlined is the 520d EfficientDynamics, which comes in at a Baby Benz-tying 0.22.