Dodge Challenger SRT-8 vs Dodge 426 Hemi

Picture of Dodge 426 Hemi
Picture of Dodge Challenger SRT-8
Category Dodge 426 HemiChallenger SRT-8
Max power (ps / bhp) 431 / 425431 / 425
Max torque (Nm / lb-ft) 651 / 480569 / 420
Curb weight (kg / lb) 1620 / 35711904 / 4198
Power / tonne (ps / bhp) 266 / 262226 / 223

Performance

Category Dodge 426 HemiChallenger SRT-8
0 - 100 kph 4.9 s4.8 s
Top speed 250 kph (155 mph)275 kph (171 mph)

Summary

Category Dodge 426 HemiChallenger SRT-8
Track Performance 00
Straight line speed 169200
Total 169200

Verdict

Challenger SRT-8 is the fastest by a small margin.

However, FastestLaps.com does not have enough lap times and performance data to make this comparison conclusive.

This comparison has been viewed 1.9k times.

User avatar
User avatar

Shaggy  9y ago

@ Super8 & Viking: I know the 426 Hemi beat several other muscle car engines in a comparison a few years ago. It went toe-to-toe on a dyno against a 427/435 HP Corvette engine, a 406 Ford, a 409 horsepower 409, and a couple other engines. These were the results I remembered:
427/435: 560 horsepower
406/405: 405 horsepower
409/409: 406 horsepower
and the 426 Hemi registered at some unbelievable number that couldn't be right, and being the Chevy guy I was, I asked myself "Why didn't they compare a 454 LS6?"


User avatar

Super8  9y ago

@ Viking: I think it's safe to say that Hemi is USA most production powerful engine in 60's. Because, I've seen my dad's friend when they dyno some of USA Big block and among of them , Hemi has the biggest power. The 454 LS6 in 1970 spec has 386.76 hp @ 5600 rpm. Ford 427 FE had 366.7 hp @ 6100 rpm. L72 had 350.43 hp @ 5700 rpm. ZL1 (But not tested by them) had 376 hp @ 5800 rpm. From this data, I think if people said Hemi is the most powerful engine in 60's I think he might be right :)


User avatar

Viking  9y ago

@Super8
I can believe that 390.66 hp net. Yeah, the official net number of 350 hp net from Chrysler is conservative I think. I think they took into consideration that different engines from the same assembly line could vary by as much as 40 hp, so even though one that came out nearly perfect could have 391 hp net, they set the official rating at the level of one built on a Monday morning when the workers were all hung over. :)


User avatar

Super8  9y ago

@ Shaggy and Viking: Well actually 350 hp net is came from Chrysler. But have you ever wonder the exact number in the engine? Well I tell you the secret. The exact number on Hemi is actually way off than you ever think. It's 390.66 @ 5900 rpm. Where I got the data? Remember my father's friend who is mechanic specially to restored old cars? Well... they got a lot of secret. They ever Dyno some of USA greatest engine in 60's to 70's and they found the exact number is much different than manufacture ever release (in net rating).


User avatar

Viking  9y ago

SAE gross standards meant the manufacturer could attach any headers they wanted with no belts, no air cleaner, no mufflers, etc.. SAE net standards that started in 1971/1972 had to use the mufflers, accessories, air cleaner, etc. just as if the engine were in the car. Much more realistic, and that is what is still used today. Horsepower at the wheels is even more accurate because it takes into account the drivetrain losses from the transmission, axles, and even tire drag, but manufactures don't use a chassis dyno for rating drive wheel hp since the same exact engine would then have different ratings when in different cars. :)


User avatar

Shaggy  9y ago

@ Viking: The 426 Hemi is my favorite engine from that era, I'm a precise person who likes accurate specs, so it kind of annoys me that the actual horsepower of the 426 Hemi is unconfirmed.


User avatar

Viking  9y ago

In this case the 1964 Hemi engines were race engines, only slightly less tuned than their NASCAR counterparts. I don't think they quite had 650 hp yet in 1964, but they certainly had over 500 hp. :)


User avatar

Shaggy  9y ago

@ Viking: So the highly underrated version was the race Hemi. Isn't net horsepower the amount of power that makes it to the wheels?


User avatar

Viking  9y ago

@Shaggy
The race Hemi engines used in NASCAR competition during the sixties put out approximately 650 hp (net). The street Hemi was tested in 1971 by Chrysler using both the old SAE and new SAE standards (gross and net). They continued to rate it as 425 hp (gross) at around 5000 rpm, but it actually had 470 hp (gross) near redline which was somewhere around 6000 or 6200 rpm. However using the new SAE standards with all the exhaust, accessory belts, air cleaner etc. installed it put out 350 hp (net). This still makes it one of the most powerful (net) engines available in my youth. For comparison: the 1971 Chevy 455 LS6 engine was rated 425 hp (gross), but only 325 hp (net). :)


User avatar

Shaggy  9y ago

@ Z: The 426 Hemi was actually underrated, I have a reliable source that says the actual power output of the 426 Hemi was closer to 650 horsepower. It was underrated to fool the insurance companies. They can make cars with 1000 horsepower, but there is such a thing as too much horsepower, a 1000 horsepower muscle car would just be spinning wheels all over the track because that's too much power to put down effectively, a 1000 horsepower SRT8 Challenger would actually be slower around a track than this 470 horsepower version because it would be harder to control therefore, harder to drive. And, actually, the 1964 Dodge Polara 426 Hemi in this comparison wouldn't stand a ghost of a chance against the 2012 Dodge Challenger SRT/8, the Challenger has a better transmission, better suspension, and better tires. But you did bring up an interesting point.


User avatar

Mental  9y ago

They can. But thank you God, they don't make ridiculously overpowered production muscle cars today! (except for the Shelby Super Snake...)

But that's only about taking to mind an acceleration aspect. Compare classic muscle to their modern analogue, and they have no chance to win around the track.


User avatar

Z  9y ago

Americans can't build faster cars than in the '60!?! I want 1000 bhp muscle car. But americans wants not :(