BMW’s M cars, like many of us who’ve been around for decades, have packed on a few pounds over the years. While the original E28 M5 sedan tipped the scales at a svelte 3,417 pounds, the latest F10 M5 weighs in at 4,288 pounds, and that’s a lot of bratwurst to haul around.

Recently, our own Nelson Ireson sat down with Road Testament’s Mike Spinelli (who’s also Editor Emeritus at Jalopnik and the current president of the International Motor Press Association) to discuss the evolution of the BMW M5 sedan and M6 coupe. Also joining in was BMW’s Matt Russell, interviewed during the recent media M5 and M6 track day at Laguna Seca.

Russell described the BMW M series as “one car to do it all,” citing the M5’s prowess as a “city connector” for high-speed driving in Europe, as well as its capability for entertainment value on a twisty road. Despite the current model’s heft, suspension and tire improvements and a significantly stiffer chassis yield truly impressive handling.

The “M DNA” also yields a predictable experience throughout the range, regardless of year. Ireson points out the similarity in shift feel between the E36 M3 and the current F10 M5. In his words, the BMW M Series represents the “ultimate expression of the ultimate driving machine.”

As for the M6, think of it as a cross between a muscle car and a sports car. It’s a bit smaller and lighter than the M5, also blessed with a lower center of gravity. In fact, Ireson calls it nearly as much fun on track as the M3, and that speaks volumes about the latest car’s development.

If you’re a fan of the roundel, budget some time to watch the complete video (which runs about 20 minutes). We’re pretty sure you’ll learn a thing or two, but we’re absolutely sure you’ll be doing some math to figure out how you can afford a new or vintage M5 or M6.