
Dodge Built a Motorcycle With a Viper V10. It Was Never Legal to Ride on a Public Road.
The Tomahawk had four wheels arranged like a motorcycle's two, an 8.3-liter 500-horsepower engine, and a theoretical top speed nobody ever tested. Dodge sold reproductions anyway — for $555,000 each.
The Dodge Tomahawk debuted at the 2003 North American International Auto Show as a design-team exercise that got taken further than anyone expected. Its central mechanical fact is simple to state and hard to process: it runs the full 8.3-liter, 500-horsepower V10 out of a Dodge Viper SRT-10, producing 525 lb-ft of torque, mounted into something shaped roughly like a motorcycle.
Fitting that engine into a two-wheeled package wasn't realistic, so the design team gave it four wheels instead — arranged in close-set pairs front and rear, reportedly inspired by the light cycles from Tron, using a hub-center steering setup that lets both wheel pairs articulate together rather than relying on a conventional fork. US regulators define a motorcycle partly by having no more than three wheels touching the ground during normal operation, which meant the Tomahawk's four-wheel layout put it outside any path to street legality before a single test ride ever happened.
The performance claims that came with it were aggressive enough to draw skepticism from Dodge's own team. In theory, 0-60 in 2.5 seconds and a genuinely absurd 300 mph top speed were floated publicly — but the Tomahawk's own senior designer publicly doubted a widely repeated 400 mph figure, noting the bike was geared for acceleration, not top speed, and that something closer to 250 mph was the realistic ceiling if it were ever actually run flat out, which it wasn't.
None of that stopped DaimlerChrysler from finding a way to sell it anyway. Later in 2004, the company commissioned a run of hand-built reproductions and listed them in the Neiman Marcus Christmas catalog at $555,000 each, marketed less as a functional vehicle than as what the company itself called 'a sleek rolling sculpture.' It's one of the purest examples in automotive history of an engineering department building something because the engine existed and the shape looked right, with street legality never actually part of the plan.

MacPherson Strut vs. Double Wishbone: Why the Cheaper One Won, and What It Actually Costs
One layout hangs the wheel off a single telescopic leg. The other locates it with two arms and leaves the engineer free to choose how the camber behaves. Almost every car you can buy uses the first, and Porsche spent a whole GT3 generation going the other way.

Four-Wheel Steering: Honda Did It in 1987 With a Shaft and a Gear Set, No Computer Involved
Turn the rear wheels the wrong way and a car gets tighter. Turn them the right way and it gets steadier. The hard part has always been knowing which one the driver wants — and Japan answered that question three different ways before anyone else shipped it.

Camber, Caster and Toe: What an Alignment Actually Changes
Three angles, three completely different jobs. One of them eats tyres, one of them decides how the steering feels in your hands, and one of them is mostly invisible until the car starts pulling.
