The automotive industry has a history of engineers getting a little too excited, leading to cars that are less practical marvels and more like mechanical Rube Goldberg machines. We’re talking about vehicles where complexity seemed to be the main goal, often at the expense of reliability or common sense. Think of it as haute cuisine for your garage, where the ingredients are fascinating but the final dish might be a bit much. From pop-up hardtops that ate your luggage space to digital dashboards that felt more like arcade games than car controls, these machines dared to be different. Prepare for a journey through automotive excess, where ambition sometimes outpaced practicality by a mile.
10. Ford Fairlane 500 Skyliner
Ford’s ambitious convertible was less a car and more an electromechanical magic trick.
In 1957, Ford launched a convertible that was basically a Transformer before Transformers were cool. The Fairlane 500 Skyliner introduced the “Hide-Away Hardtop,” a steel roof that disappeared into the trunk thanks to a ballet of multiple electric motors, hydraulic jacks, and over 600 feet of wiring. This complexity meant significantly less trunk space—making any road trip feel like a game of Tetris with your luggage.
The added weight and mechanical complexity strained performance and fuel efficiency. Powered by Ford’s sturdy Y-block V8s, like the 292 or 312 cubic inch variants, it was powerful but the roof hardware was a constant drain. The intricate design proved too costly and complicated for mass appeal, leading to its discontinuation after just three model years.
9. Rover P6
This British sedan apparently forgot it was supposed to be a car and decided to be a concept from the year 2000.
Built from 1963 to 1977, the P6 was a total maverick with its “safety frame” chassis and body panels you could unbolt, like a Lego set for adults. This setup was revolutionary for crash safety and made repairs easier, though rebuilding one today is like deciphering ancient hieroglyphs.
The front suspension had a setup so wild—think bell-cranks and horizontal springs—because they originally planned to shove a gas turbine engine in there. They never did it, but the thought was there. Later, the P6B variant got a sweet, all-aluminum 3.5-liter V8 lifted from Buick designs. This engineering wizardry nabbed it the first-ever European Car of the Year award in 1964, proving that sometimes, wild ideas actually work.
8. Mercedes-Benz 600 (W100)
This behemoth was less a car and more a rolling statement of ultimate luxury engineering.
Built between 1963 and 1981, the W100 was for those who demanded the absolute best. Its heart was a monstrous 6.3-liter V8 engine, packing around 250 to 300 horsepower. What truly set it apart was its intricate network of high-pressure hydropneumatic systems, powering everything from windows and seats to the trunk lid and partition.
The complexity was staggering—hundreds of feet of wiring and hydraulic lines snaked throughout this machine. Advanced air suspension ensured a ride so smooth it felt like floating on a cloud. Plus, dual climate control systems allowed front and rear occupants to dial in their preferred temperatures separately—a nod to its chauffeur-driven destiny. Keeping one running today is like performing open-heart surgery with a toothpick.
7. BRM H16 Engine / BRM P83 & Lotus 43
Formula 1’s quest for more power led to this engineering nightmare that was as tall as a giraffe and twice as awkward.
Essentially two flat-8 engines stacked vertically, each with its own crankshaft geared together, this 3.0-liter monstrosity produced around 400–450 hp when it finally stopped throwing tantrums. It powered the BRM P83 and famously found its way into the Lotus Type 43 chassis, with Jim Clark even snagging a win at the 1966 U.S. Grand Prix.
However, this BRM H16 Engine weighed a ton and required a pit crew just to look at it. Its love affair with vibration and constant thirst for oil made it a nightmare to keep running. This complex beast quickly proved that sometimes, simpler is better, pushing teams back towards V8s and V12s that actually stayed on the track.
6. Citroen SM
When Citroën bought Maserati in 1968, the resulting automotive love child looked like it landed from another dimension.
Produced from 1970 to 1975, this French-Italian stunner packed a Maserati V6 engine, initially around 2.7 liters, and featured hydropneumatic suspension that made bumpy roads feel like freshly paved tarmac. This was basically a rolling tech demo with self-leveling suspension, power disc brakes at all four wheels (inboard, no less), and steering that actually got firmer at speed.
Those swiveling headlights were pure genius for night driving, though Uncle Sam made them stay put for safety regs. With a drag coefficient reportedly as low as 0.26, it was slippery smooth, but all that complexity meant it was about as easy to fix as assembling IKEA furniture blindfolded.
5. Citroen GS Birotor
Fewer than 1,000 of these French oddities ever rolled off the assembly line between 1973 and 1975.
Citroën, known for its avant-garde engineering, decided to shove a twin-rotor Wankel engine—basically two rotary engines stacked—into its already quirky GS model. This Comotor-developed powerplant promised silk-smooth operation and delivered performance comparable to larger engines. Of course, it also guzzled fuel like a frat boy at a beer pong tournament, a major issue when the 1973 oil crisis hit.
The GS Birotor kept Citroën’s signature hydropneumatic suspension and added wider tracks and beefier brakes to handle the extra grunt. Yet, the rotary’s thirst and nagging doubts about its long-term health sealed its fate. Citroën reportedly bought back and scrapped many of these unique machines, turning them into one of the rarest Citroëns and a collector’s dream for those who can find one, let alone fix it.
4. Aston Martin Lagonda (Series 2)
William Towns’ razor-sharp “folded paper” design looked less like a car and more like a concept from a sci-fi flick.
When Aston Martin unleashed the Series 2 Lagonda in 1976, it was pure automotive audacity. Underneath that wild exterior, a robust 5.3-liter V8 engine did its best to power this spaceship, usually through an automatic transmission.
The real jaw-dropper was the interior. This car featured a digital LED dash that later swapped for a cathode-ray tube (CRT) screen, plus touch-sensitive controls that were as temperamental as a diva on opening night. These electronics, designed before proper car computers were a thing, frequently threw tantrums, making repairs a nightmare that cost more than a small island. With only about 645 of these technological marvels ever built, owning one today is like holding a rare, albeit slightly glitchy, piece of automotive history.
3. Buick Reatta
When a mainstream brand tries to play boutique, you get this semi-handbuilt halo car with futuristic tech.
Forged in a specialized “Reatta Craft Centre” from 1988 to 1991, this two-seat coupe and convertible was Buick’s attempt at exclusivity. Under the hood sat a solid GM 3.8-liter 3800 V6, delivering power through a 4-speed automatic.
What really screamed “future” was the optional color touchscreen, the Graphic Control Center (GCC). This beast controlled everything from climate to diagnostics, making it feel like piloting a spaceship. But like a lot of early tech, it was finicky and expensive, leading Buick to dial it back with analog controls later. Out of roughly 21,751 units produced, only the earliest ones flaunted this futuristic—and famously unreliable—interface.
2. Mitsubishi 3000GT VR-4
This 1990s sports coupe was basically a rolling tech demo armed with more gadgets than a spy thriller.
It rolled out with a 3.0-liter twin-turbocharged DOHC V6 engine pushing about 300 horsepower in US spec, but that was just the start. Full-time all-wheel drive (AWD), four-wheel steering (4WS) so it could practically pirouette, and active aerodynamics that adjusted spoilers on the fly like a race car driver’s mood swings.
Sure, all this tech made it a heavy beast, and repairs felt like assembling IKEA furniture blindfolded, but that complexity is exactly why enthusiasts dig it. Mitsubishi threw every gizmo they could imagine at it, creating a machine that’s still a standout in the 1990s performance car scene.
1. Subaru SVX
Giorgetto Giugiaro’s design masterpiece featured the most distinctive side windows in automotive history.
Italian design legend Giorgetto Giugiaro penned the SVX, and its “window-within-a-window” side glass wasn’t just for looks—it was engineered to slice through air more cleanly and keep the cabin quieter, like noise-canceling headphones for your ride. Underneath this unique exterior, Subaru tucked a 3.3-liter flat-six engine churning out about 230 horsepower, exclusively mated to a 4-speed automatic transmission.
Positioned as a comfortable grand tourer to challenge cars like the Toyota Supra or Nissan 300ZX, the SVX prioritized smooth rides over aggressive handling. However, its unconventional styling and steep price tag kept sales modest. With only around 24,000 to 25,000 units produced worldwide between 1991 and 1996, the SVX remains a niche cult classic—testament to Subaru’s willingness to experiment with design and engineering.