German car publication Auto Bild(owned by Business Insider's parent company Axel Springer) has a pretty extensive catalog of groovy content on its YouTube channel, including numerous white-knuckled, head-to-head showdowns betweennaturallyGerman high-performance automobiles.This videofeatures two of our absolute favorite Teutonic rockets: the ultra-peppy BMW M235i and the BMW M4. We spent some qualitytime with the M235i last year and were deeply impressed. We also sampled the M4, and were impressed for different reasons.It's not a true apples-to-apples comparison. Yes, both are two-doormachines. But the M235i comes to the contest with 320horsepower, while the M4 has ... 420. The M235i also isn't a true M Sport car, but rather more of a kinda-sorta M car that landed ahead of the true M2, which arrives this year.The M235i is lighter, but the M4 isn't exactly heavy, giving up only a few hundred pounds (depending on configuration) to the sprightlier bimmer.Interestingly, in Auto Bild's race, the M235i gets a better jump off the line and has the M4 playing catchup ... until the 100 km/hr barrier (62 mph) is breached. At that point, the M235i is tapped out, but the M4 has more to give.Still, theM235i's performance to more or less the legal US speed limit shows you that you don't always need to have the biggest, baddest motor to feel like you're going fast. Sometimes, you're actually goingfaster than the guy with the bigger, badder motor.It's a little something called power-to-weight ratio.To be honest, we could see the result of theAuto Bild test coming. In our experience, the M235i was like driving a Sidewinder missile, while the M4 was like saddling up on an angry dragon. The Sidewinder justgoes.The big 'ole firebreather takes a bit longer to get properly motivated.Join the conversation about this storyNOW WATCH: The best car of the year ' the Volvo XC90 Click here to read full news..