Quantum Leaps: The Quad Four Pontiac Fiero That Never Was

Jo Borras
by Jo Borras
quantum leaps the quad four pontiac fiero that never was

To many children of the 1970s and 80s, the Pontiac Fiero is something of a tragic figure. Its mid-engine chassis and clean, sporty lines made performance promises that its 2.5L OHV, 92 horsepower “Iron Duke” could never deliver on. Even later models, with their 140 HP, 2.8L V6 engines were disappointments – albeit lesser ones. Despite continuous improvements, the car was only in production for four years, and ultimately became more sought-after as the basis for a number of ill-conceived Faux-rrari kit cars than for what it was … but it didn’t have to be this way.

Across town, Pontiac’s GM stablemate Oldsmobile had something that could have changed the fate of Pontiac’s Fiero – and maybe the Chevrolet Corvette’s, too – and that’s the subject of this first engine swap fantasy file: the Quad 4.


As the late 1970s rolled into the 80s, GM was hemorrhaging market share to Japanese brands like Toyota and Honda. GM’s U.S. market share had plummeted from somewhere in the 40 percent range to less than a third, and the company was hurting. GM brass believed that they needed a small, efficient overhead cam engine to compete, and what their engineers came up with was ultimately dubbed “Quad 4” (as in: four valves per cylinder, four-cylinder engine).

In its day, the Quad 4 was a marvel. Where the Fiero’s engine spun all the way to a 5,000 rpm redline, the Quad 4 would spin to 6,800 rpm before reliability concerns drove GM to artificially limit the redline to 6,500. What’s more, the Quad 4 weighed a bit less than the Iron Duke 4 cylinder – and a lot less than the 2.8L V6 – that made it into the Fiero in our timeline, all while making a wholly respectable 190 hp and 160 lb-ft of torque. In 1987, those numbers weren’t too far off from what the Mustang/Firebird V8s were making.

So, the Quad 4 was a great motor. It was, arguably, the most important GM engine design of the 1980s and 90s, serving nearly two decades until being ultimately replaced by the Ecotec engine at the turn of the century. What it was not was readily available to Pontiac.

I know, I know – that doesn’t make any sense, does it? Today, if a car company makes an engine for one brand – let’s say a 2.0L turbocharged four-cylinder – you’ll probably find that engine in just about every brand of car that company makes. VW? Check. Audi? Check. Skoda? I don’t know – but, probably check. GM in the 80s was a different thing, though. It was like a tiny version of America, and each brand was like a state, greedily snatching at money and resources and sparring over what passed for political power within GM. One of the things that said power could get you, as a brand, was veto power over what other brands could do.

Indeed, if you believe some of the automotive conspiracy theorists out there, GM made sure the Fiero was given crappy engines on purpose, in order to protect Corvette’s position as “GM’s performance car”. That power could also be leveraged by a brand to score a unique platform or, as in this case, a unique engine. As surprising as it might seem today, the Cutlass Supreme was the #1 best-selling car in these United States every year from 1976 to 1983. Because of that, Oldsmobile wielded an entire metric fuckton (fucktonne?) of power within GM in the mid-80s.

What came next looks something like this: Olds wanted the Quad 4, so Olds got the Quad 4.


In the old sci-fi series Quantum Leap, every episode starts with an introduction that goes like this …

Theorizing that one could time travel within his own lifetime, Doctor Sam Beckett stepped into the Quantum Leap accelerator – and vanished. He awoke to find himself trapped in the past, facing mirror images that were not his own, and driven by an unknown force to change history for the better. His only guide on this journey is Al, an observer from his own time, who appears in the form of a hologram that only Sam can see and hear. And so, Doctor Beckett finds himself leaping from life to life, striving to put right what once went wrong and hoping each time that his next leap… will be the leap home.”

… so, for this fantasy swap, we’re Sam Beckett. We’re not building some tire-shredding monster or overly styled, stanced, and box-fendered SEMA car. We’re simply putting right what once went wrong and giving the light, nimble Pontiac Fiero the 190 horsepower, DOHC, 6,800 rpm heart that GM should have given it in the first place.

If it had, well – I don’t think the Fiero would have sold any better, to be honest (I subscribe to the belief that enthusiasts don’t buy new cars in sufficient numbers to justify building enthusiast cars), but I do believe that a Quad 4-powered Pontiac Fiero could have been a bona-fide GM performance classic in its own right, spoken of in the same breath as the Buick Grand National and GMC Syclone. And that maybe, just maybe, it wouldn’t have made sense to chop up a Fiero to make it look like a Ferrari – because the Fiero would have been the car you wanted to begin with.

The car deserved at least that; I think. And, with a Quad 4 behind the seats, it may have gotten it.

[Images: GM]

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2 of 47 comments
  • Lightspeed Lightspeed on Aug 27, 2021

    I drove many Quad-4s when I worked at a dealership, it was very impressive. The 190HP versions wold burn the front tires of a Grand-Am to the ground, it was responsive and had good low-end torque, would have been brilliant in the Fiero. But I also sold a lot of timing chain and guide sets for them. Another great idea that GM managed to screw up. I hear though the Ecotech is pretty tough, I know a guy who has turbo-ed one to 400HP and he can't break it, try as he might.

  • DenverMike DenverMike on Aug 28, 2021

    With the Quad 4 and decent suspension, it would've sucked less than the Corvette at the time. A lot less!

  • Da Coyote It's attractive, but having owned an Alfa in college (yes, I was stupid enough to have one), and even having loved driving it during the few days it was drivable, I'll give it a pass. However, I'd love Italian styling coupled with Toyota engineering. A painful thought would be Toyota styling coupled to Alfa engineering.
  • EBFlex Only 33 miles is disappointing. 50 miles should be the absolute minimum when it comes to PHEVs, especially for the cost of this Toenail
  • Theflyersfan I pass by the "old money" neighborhoods next to the golf course community where many of the doctors and non-ambulance chaser lawyers live in town and these new Range Rovers are popping up everywhere. It used to the Q8 and SQ8, but I'm thinking those leases expired, traded in, or given to their never leaving home son or daughter so they can smash it at a DUI stop, get on the news, and get out of jail free. I'm not getting into their new design language, and I like Land Rovers. They aren't supposed to look like smooth bars of soap - they need a few character lines or hints of offroad ability, even though the odds of this getting on anything other than a gravel parking lot are less than nil. And with the new Range Rover's rear and the taillights, if I wanted a small solid red bar for a lamp that did everything and then dies and then I can't tell what the car wants to do, I'd follow a late 80's, early 90's Oldsmobile 98.
  • Lou_BC Legalize cannabis for racing
  • Add Lightness Range Rovers have come a long, long ways from their original concept of a gentleman's Land Cruiser. Pretty useless off road now but the wannabees will love them until the warrantee expires.