A 1970 Dodge Coronet with a six-cylinder and a stock rear end really was pretty pedestrian by today’s standards – but that’s not the whole story. Order the same car as a Super Bee with the 426 Hemi and the right gearing, and documented runs put it in the 12-second quarter mile bracket at well over 100 mph. Factory horsepower ratings from that era were also notoriously conservative, hiding just how much these engines actually made. Here’s the case for why “muscle cars were slow” doesn’t hold up once you look past the average car.
Every muscle car forum has that one guy ready to tell you these cars were slow by modern standards, and technically, he’s not wrong about the average showroom special. But there’s a massive difference between the six-cylinder Coronet your uncle’s neighbor drove to work and the same car ordered with the right options box checked, and that gap is exactly where this conversation usually goes wrong. Buried in Chrysler’s own build sheets are Super Bee and Hemi combinations that make a mockery of the idea that ’60s and ’70s performance cars were universally sluggish. So before writing off an entire era of American performance, shouldn’t we actually look at what the quickest configurations could do?
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The Hemi Numbers Nobody Talks About
The 1970 Coronet example already mentioned – 6.7 seconds to 60, roughly a 14-second quarter mile – is a perfectly respectable number for a base R/T Hemi with a stock rear gear and a driver being reasonably gentle off the line. But order the same car as a Super Bee with the 426 Hemi and the right rear-end gearing, like a 4.10 final drive, and documented runs have put that combination in the 4.8 to 5.4-second range to 60 with the quarter mile dropping into the 12-second bracket at well over 100 mph. That’s not a car that got left behind by modern performance standards – that’s a car that would still embarrass plenty of showroom sports cars sold today, more than fifty years later.
Why the ‘Muscle Cars Were Slow’ Argument Falls Apart Under Scrutiny
The mistake people make is judging an entire era by its average, not its ceiling. Factory ratings back then were also notoriously conservative – a 425-horsepower Hemi rating was widely understood at the time to be underselling what the engine actually made on the dyno, a sandbagging trick manufacturers used partly to keep insurance companies and partly to keep the sanctioning bodies off their backs. Compare a stripped-down, drag-package Hemi car built specifically to be quick against modern cars built specifically to be quick, and the gap shrinks a lot faster than the original claim gives it credit for. Slow was never the right word – underrated is.
How Magazine Testing Actually Varied Back Then
Period road tests from outlets like Car and Driver or Motor Trend were never run under lab-controlled conditions — results shifted with altitude, ambient temperature, tire condition, and simply how aggressively a given test driver was willing to abuse a clutch or launch off the line, which means the 0-60 numbers most enthusiasts quote today were never as standardized as a modern manufacturer-claimed figure. Two magazines testing the same car in the same month could easily post results a full second apart.
The Insurance War That Shaped the Whole Era
Rising insurance premiums on high-horsepower cars became a genuine industry problem by the late 1960s, and manufacturers responded in ways that directly affected performance — sometimes by underrating engines on paper to keep buyers’ premiums down, and eventually by building genuinely detuned models as insurers began charging punishing rates for anything with big-block displacement and a young driver behind the wheel. That financial pressure shaped factory specifications as much as any engineering decision did.
Measuring the Gap Against Today’s Benchmarks
Modern factory performance cars like the Dodge Challenger SRT Demon or Hellcat Redeye can run 0-60 in the 2 to 3-second range, a gap that looks enormous next to even a well-optioned ’70s Hemi car, but that comparison also has to account for radically different tire compounds, launch-control electronics, and all-wheel-drive or advanced traction systems modern performance cars take for granted — technology that simply did not exist for a driver working a clutch pedal and bias-ply tires in 1970.
The Net-Versus-Gross Horsepower Switch That Confused Everything
The industry-wide switch from gross to net horsepower ratings in 1972 makes cross-era comparisons even messier, since gross ratings were measured on a stripped, no-accessories dyno while net ratings reflected an engine actually installed in the car with a full exhaust system, alternator, and accessories attached. A muscle car rated at 425 gross horsepower before 1972 might have posted a noticeably lower net number under the new standard, even with zero mechanical changes to the engine itself.
Bias-Ply Tires Were the Real Bottleneck
Traction, not horsepower, was often the limiting factor for quarter-mile times in this era, since the bias-ply tires standard on most muscle cars offered dramatically less grip than the radial and drag-radial compounds available today. A Hemi Super Bee putting down four-digit torque numbers through a narrow bias-ply tire was fighting wheelspin that a modern car with sticky radials simply does not have to deal with off the line, which means a lot of that era’s ‘slow’ quarter-mile times reflect the tires as much as the engines.
Underrated Was Always the Better Word
Line up the best-optioned cars of the era against their contemporaries rather than against modern benchmarks built with fifty additional years of tire and electronics development, and the picture flips: these were purpose-built performance machines held back by contemporary technology limits, not underachievers by the standards of their own time. That distinction is exactly why ‘underrated’ fits the era so much better than ‘slow’ ever did.
How Track Prep Itself Has Changed the Numbers
Modern drag strips routinely apply chemical traction compounds to the racing surface before an event, a practice that barely existed in any organized form during the muscle car era, when most quarter-mile runs happened on bare asphalt or lightly prepped surfaces at best. That single difference in track preparation alone accounts for a meaningful chunk of the gap between a period magazine’s quarter-mile time and what the same car might run today on a properly prepped modern strip with the right tires bolted on. None of that changes what the engines themselves were capable of on paper — it just means the era’s real-world numbers were always going to undersell the hardware, prep surface and all.
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This may be true,,but they were too f##king cool compared to the buggies on the road today
70 Super Bee
figure buck 50 aint bad …and most came close
My 70 429 SCJ would do 140+
It actually took some skill to drive these cars. Especially the Corvettes. First time I hammered one from a stop after my buddy who owned the car told me to, I spun a nice donut in the middle of the street like I was on ice. From my viewpoint of having driven most of thee cars, each required some level of skill to successfully race.
I always told these young kids that my 10 year old can drive these new cars. Nothing like being thrown back into your seat and knowing what your car Is capable of. Flying down the street sideways doing burnouts takes skill or you will kill someone or yourself
👍🇺🇸
Nothing like trying to accelerate in a 69 Super Bee on a hard curve😜
Ron McCartney Most Mopars were good in a straight line, but pretty scary on curves!
This I know👍😜
Straight is better.
These were great cars and fast for there time. A P51 mustang isn’t as fast as a modern fighter jet… But like the cars the cool factor goes way beyond.
And these cars weigh 2x what today matchbox cars wiegh.. That’s why!!!
not really todays American muscle car have curb weight guidelines for insurance reason. The Hellcat is over 4000lbs, even vettes weight a lot along with all mustangs. I got my roadrunner down to 2850lbs.
No. Today’s cars are way heavier.
no doubt
imagine a hellcat weighing under 3000lbs, car woud be pulling high 8’s on the strip
Well I couldn’t live in 2017 back in 1970 – so I guess fast for that time will just have to do.
They had character and just about everyone could afford one. That’s funny they’re comparing today’s computer controlled cars with 50 year old cars. That’s like comparing a Hemi superbird to a model T. They just don’t get it.
They had character and just about everyone could afford one. That’s funny they’re comparing today’s computer controlled cars with 50 year old cars. That’s like comparing a Hemi superbird to a model T. They just don’t get it.
The manufactures just don’t get it. So now there comparing today’s computers on wheels with 50 year old cars. That’s like comparing a Hemi superbird to a model T. To even get these cars to sell they had to mimick the old ones.
Hot Wheels
Due to the design, archaic suspension systems, brakes and steering systems (archaic by today’s standards), these cars FELT extremely powerful. And those big honking engines made loads of torque down low and lots of torque at low engine speeds is what smokes rear tires, sinks ya back into the seat back and puts that big ass grin on your face. And these old cars where chock full of that type of mojo! Plus the jaw dropping style and essence of the original muscle cars will never be duplicated.
Back in the day a 13 second car was fast for its time. Slight mods with today’s tech, these cars easily run 10 11 seconds passes
love that color
They more than make up for speed, with style, and class!! Back then, unlike today, every car had a different appearance, and all of them, BEAUTIFUL!!
I tell people this alot and I get alot of hate. People don’t want their illusions destroyed.
Most people don’t realize those old 1/4 mile times on those cars were done on skinny, bias ply tires. Put a set of modern drag radials on ANY old muscle car and your gonna knock about 2 seconds off those times
Really, Would loved to still have my 1969 GTX 440-4 bbl. 727-A1 Trans. just to see what these stock factory so-called luxurious Muscles could do in the 1/4 mile.
I know that sucks so bad, how shitty, give me that car I will dispose of it!
Back then we could work on them without having to have a engineering degree. That was as much fun as driving them.
Still a hell of a lot cooler & no electronic nanny gadgets to save your ass if you weren’t a good driver. A real connection between man & machine.
Let me just say…… no power steering, just non power drum brakes, no hydraulic assisted clutch and longer then most of todays crew cab shortbed trucks….. it took skill.
Good old days.
I guess we all need a Honda with a HUGE thing hanging out the back to make it sound bad!!!!
What year is this super bee?
You can’t compare, those cars , back then weigh 3x the amount of today’s cars, n still could pull front ends off. They were tanks. A now a day cop car might catch up, but I doubt they could Ram you or handle a ramming, there’s no plastic on that car
Looks like 71 to me.
Wasn’t your purple Super bee a 71?, Hell of a car.
No it was a 70
No it was a 70. Front grill just a bit different and had the tail fin.
Ok, I’m getting old and forget things.
I once had a chance to buy 2 super birds for 500 and did not have the money back then and did not know what they would be worth today or I would have cut my leg off to get them. 2 now I said 2 for Gods sake. Makes me sick every time I think about it. :(
My God 2 for 500 ,I seen one go for 300,000 on TV auction out west.
Makes me cry !!!! I don’t want to think about it. :(
I know your right, I wish we had a car lot full of yours and mine old cars we be set for Life. OH well !!
Yes we would. And just think of the money we lost makes me want to cry. If we would have kept one or two of them we would be set. Like you said ……. Oh well you can’t bring them back now.
My son Shawn he’s 17 now and can’t believe the kinds of car’s we had. We watched fast and loud , counting car’s, he tells me that I am crazy for selling them.
Well back then we didn’t know what we really had. Now days kids want the low riders that drag the ground and could not seel them at the big boy auction for much of anything. But most of that comes from Texas or California where they have to get low so they can get in them. :)
How will they get over the big wall??????
Trump keeps it up and the missiles will be coming in our direction. WWIII on it’s way!!!!!
59 of them,I think he pissed off Russia.
Yep he did. And we will find out how bad soon I’m sure!!!!
Little Kim could be next, if the Russian Navy don’t get us first.
They may have been powerful, but they were rather loose in the steering at high speeds. And God help you if you had to stop suddenly when many of them still had drum brakes. They were best at going in a straight line, not so much at taking on a road course with sharp curves. That’s where newer cars exceed those old muscle cars. On the flip side, the sacrifice to taking curves fast is a much stiffer ride and practically sitting on the ground.
Yeah , you could say that about the early Indy cars also , comparing yesterday car’s to the ones of today doesn’t change the facts . For their days, They were fast, and yes they are muscle cars !
Still like the older ones
Super bee ……:-) :-) :-)