So, that BMW IMSA GTP engine displacement, eh? It’s a 4.0-liter V8 under the hood of that M Hybrid V8. Sounds simple, but lemme tell ya, pinning that down specific-like took a bit more poking around than I first figured.

It all got started, like these things often do, with a bunch of us car nuts just jawing the other day. The new BMW GTP racer came up – sleek machine, no doubt. But then the talk turned to what’s actually powering it, and boy, the theories started flying. One fella was sure it was some tiny little high-strung thing because of the whole hybrid setup. Another was stuck on the old days, probably imagining some giant classic BMW six or something. Total guesswork, mostly.
That got my gears turning. I thought, “Alright, I’m gonna get to the bottom of this.” Figured it’d be a quick search online. Yeah, right. My first few tries just threw a whole heap of stuff at me – articles about the new car, sure, but also a ton about older BMW GTP efforts from way back when. It was a real jumble, trying to sift through it all to find the current spec.
So, I had to get a bit more methodical.
- First off, I zeroed in on the official name: “BMW M Hybrid V8.” That helped narrow things down a lot.
- Then I started digging specifically for “engine specifications” or “displacement” for that model. Lots of talk about the electric motor and battery, which is all well and good, but I was after that combustion engine number.
- Saw the “P66/3” engine code popping up. That looked promising. Seemed to be the internal designation for the V8 part.
- Finally, after clicking through a fair few motorsport news blurbs and tech rundowns, the number started to solidify: 4.0 liters. A V8, twin-turbo, displacing four liters. There it was.
Now, you might be asking, “Why go to all that trouble for one number?” Well, it wasn’t just to win bragging rights with the guys, though that’s always a small perk, ha! Truth is, I was trying to explain this newfangled racer to my dad. He’s getting on in years, see, and he was a huge BMW enthusiast back in his prime. We’re talking E9 coupes, early M cars, the whole shebang. He’s got these old racing annuals he still flips through.
When I told him BMW was back in top-flight sports car racing with a hybrid, he just got this puzzled look. He kept asking, “But what’s the real engine, the petrol one? Is it like those old straight sixes they had, the ones that screamed?” Trying to get across that a 4.0-liter V8, even if it sounds a bit smaller than some old legends, is a serious bit of kit when paired with modern turbos and an electric boost… well, it took some doing. He’d point to some massive displacement figure in one of his old books and grunt. It’s funny how a single spec, like engine displacement, can be a whole conversation starter, or a bridge to understanding new tech for the older generation. Took me a bit of digging, more than I expected for what seemed like a simple fact. But hey, now I can tell him straight. And he just nods, you know? Maybe he gets it, maybe he just appreciates the effort. That’s the story of my little hunt for that BMW engine displacement.
