M3 Coupe or 1-Series M Coupe – Which one would you choose, and why?

26 May

By Matt McCarron

Insideline.com has dynoed the BMW 1M, and the results are impressive. According to insideline’s test, their 1M put down 331 hp 5,150 rpm and 362 lb-ft of torque from 2,500-4,500 rpm (at the wheels). In contrast to insideline’s test, BMW factory rated the 1M as having 335 hp at 5,800 rpm and 332 lb-ft from 1,500-4,500 rpm.

Now, before you go off the deep end and claim the dyno numbers are impossible because no car loses just 4 hp and 7 lb-ft from the crank to the wheels, just wait a second. There is an obvious explanation to these numbers. BMW has taken a page from the Porsche handbook and has significantly underrated the horsepower and torque numbers of the 1M.

But does it really make a compelling enough argument to warrant buying one over a M3. Well, when compared to E92 M3, which has a factory rated 414 hp at 8,300 rpm and 295 lb-ft at 3,900 rpm, the 1M might be down on horsepower. However, it makes up for it in other areas. Based on factory numbers, the 1M has an additional 37 lb-ft than the M3 and it has the advantage of weighing 342 lbs less than the top-of-the-line 3-series.

The M3 and 1M are two completely different animals. One has a traditional M-derived 4.0-liter high-revving, naturally-aspirated v8 that needs to see high rpms to achieve its peak horsepower output. On the other hand the 3.0-liter turbocharged in-line six-cylinder engine in the 1M is a totally different power plant altogether, varying from the S65 in almost every way.

So which one would you rather have in your garage?

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