the ultimate American Muscle Car Faceoff ; MOPAR 426 HEMI vs. Ford BOSS 429 HEMI

Both engines were grossly underrated. The Boss was closer to 500 horsepower and so was the 426 HEMI. I recently saw a video where a rebuilt to a close to stock as possible 426 HEMI denied out at 495 Horsepower at 5800 RPM. Like I said, under rated.

I wouldn't show so many pictures of Oddball motor stuff when you're referring to the Hemi motor stick to just hemispherical motor pictures please

Ok, after reading all the comments, all I can say is that I sure am glad that all these motors and cars were there! We grew up in an unimaginably awesome time! I feel very blessed to have grown up in this amazing country in the 50’s, 60’s, and 70’s. It’s like a problem of riches.

The Hemi's carbs were over 1000 cfm while the Ford was only 715. The Boss motor was starving.

426 Hemi was always slow on the eighth mile but would come alive and catch up on the final stretch. 440 and others would gap it on the eighth.

Challenger came out in 1970 , not 1966, 67,68, for the end of 69 they were starting to be advertised and ordered but would be titled 1970.

From what I remember, the Boss 429 was a disappointment on the street and the dragstrips. If you sunk a boatload of money into them, they may have been competitive, but out of the factory they were not very impressive vs the hype they received. Maybe I'm wrong, but.....

I'd take either, just need to win the lottery.

I know them both and love them both. If I were asked to choose, I have a simple answer, I'd take both.

The 426 hemi used solid cam from 64-69. 70-71 hyd cam. The street hemi is not same as race hemi. It’s designed for shifting at 7200 rpm. Go look up the ASE engineer paper Chrysler turned in. The 426 hemi is a nascar engine adapted to drag racing. I have bunch of 426 hemis. You should redo this video and get your facts at 100%.

The cylinder heads on the BOSS 429 are aluminum ... not "cast iron".

Would have been cool to see the OW43 Oldsmobile 455 hemi in the mix! Yeah, I know. I wasn't aware they made one, either! Never hit the production line but I guess it was quite a beast!

Boss 429 was disappointing. So was the 429CJ. Good results were achieved with the CJ valves fitted to the 429 PI head and port matched to the CJ intake. I'm kinda of a Ford guy, but without a ton of work, I'd pick the hemi.

The street motor was a Semi Hemi not a full hemi. It had a quench or flat areas on eather side of the Hemi dome whitch stoped it from being a full Hemi dome . And the coments are correct the heads are not cast iron .

Brutal how many mistakes are made when describing the engines.

Road racing?? Even in the US those engines hardly got a look in. Most tintop road racing has been 6 litre limit [366ci]

The real appeal, as always, is scarcity. Ford's BOSS 429 and Chrylser's Hemi were low production volume engines at the top of each manufacturer's line up. Many Chrysler performance cars are worth a little more than their cross town rivals all these years later because few were sold originally and as a result fewer survive to this day. Low production engine options make the cars that have just that much more valuable years later. It breaks down pretty easily and predictably. Virtually any Barracuda or Challenger from back in the original Muscle Car era will fetch more money than a Mustang or Camaro this is most comparable. Really rare high end engine options close the gap though in many cases. The BOSS 429 Mustangs are a good example of how this works. An L88 Corvette or ZL1 Camaro also highlight the few Ford and Chevy cars that fetch the bigger dollars along side those Hemi Cuda's and Challengers.

It's a shame, as time goes on, these presenters doing videos of these legendary engines that are part of racing/high performance history get more and more of the information wrong. These experts that got it off the web somewhere else. These mistakes get passed along through these videos to the people who believe EVERYTHING that's on the internet, and soon many of the truths about these pieces of history are lost forever. Effing Shame.

why am I looking at so many irrelevant details and engines w/o explanation? it like you are trying to show us what an octagon is, but then popping in a lot of squares and triangle w/o explaining why. It hurts my head

Was ford 429 a hemi never heard that before. Far as I knpw it was not hemispheric combustion chamber on ford.