Rarely found in a Ford in the USA.
Posted on 12/09/2025 8:20:29 AM PST by Omnivore-Dan
While less prevalent these days, it’s hard to not appreciate the sound of a high-revving naturally aspirated engine. The team at Boreham Motorworks just pulled the cover off their new 2.1-liter, inline-four cylinder engine. This small-displacement powerplant puts out an impressive 325 horsepower and, as the name suggests, screams all the way to an astonishing 10,000 rpm. It may be small, but innovative engineering is significantly pushing the boundaries for what a street-driven engine can be.
(Excerpt) Read more at enginelabs.com ...
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I have a Lotus Elan that desperately needs one of these engines
That’s a very cool Ford restomod and I would love to have one
My Honda 50 red-lined at 10500 rpm.
No turbo. And with pushrod activated valves.
Back in about 1965.
I had a whole slew of muscle cars, small block V8 and big block V8 engines. MY favorite was a 350 Chevy bored and stroked to 383 C.I. It made 610 h.p. on a dyno. Now we have a 2012 Chevy Sonic with a 1.4 litre turbo, and a 2022 Buick Encore with the same engine, but 10 additional h.p. They get me where I want to go, but I still miss my S10 pickup with the 383. I really never had problems with carbs, Holley carbs were very reliable.
Bkmk
Impressive. What was the horsepower?
I like the way new engines will shut down if they have a bad sensor.
Liter sport bikes spin up to 13,000-14,000 and produce around 186 BHP. So its not unheard of to get nearly 200 HP per liter.
Don’t know. It was probably measured in mousepower.
Big hairy deal. Lots of literbikes make close to 200 bhp per liter. The 2026 BMW M1000RR makes 214 bhp from 999cc and revs to 15,100 rpm.
And Honda built NA racing motorcycles all the way back in the 1960s that revved to 20,000 rpm+.
Concerned about durability given it’s a thin-walled cylinder design. Harkens back to the days of the Vega engine.
Plutonium + 2.3 GW of electricity.
This. There's something very soothing about listening to a big V8 purring down the highway.
Yea me too, up in the mountains, semi lost.
My brother had a 1979 Olds 98. You didn’t steer it … you aimed it.
My only big block was a ‘65 gold Chrysler 300 with the base 383 and Carter 4 barrel. 330 hp. Too costly to maintain.
Rarely found in a Ford in the USA.
I know the feeling. Cruising down calm seas with a 58,000 bhp direct drive, straight 8.
but I love the feeling of a full size Chevy 350 cruising at 95 mph at low RPM like it is not even breaking a sweat...
The 2026 BMW M1000RR makes 214 bhp from 999cc and revs to 15,100 rpm...
++++++++++
There can be several truths at the same time. This is why the I/C engine is almost spiritual in it’s beauty. From locomotives to airplanes, things above the ground and below the water. Probably mans coolest invention.
Could be some military applications for it.
Power levels easily matched by MotoGP and late model sportbike engines.
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