The last of a dying breed, the S65 would be BMW's final naturally ... BMW's first-ever turbocharged V-8 engine, but also the first application of the "hot-vee" layout. This layout would soon ...

Putting one under the hood of a 135i, though, might just be the best thing you can do with the old S65 engine. My position on the 1M would be dramatically different, however, had it been fitted ...