can cars go the speed of sound

[ColtonRose]

No, production cars cannot go the speed of sound. The speed of sound, or Mach 1, is approximately 767 miles per hour (1,235 km/h) at sea level. This velocity is far beyond the capabilities of any street-legal vehicle ever made. The current world record for a production car, held by the Bugatti Chiron Super Sport 300+, is 304.7 mph, which is less than half the speed of sound. Achieving such extreme speeds involves overcoming immense engineering challenges related to aerodynamics, propulsion, and stability that are simply not feasible for a car designed for road use.

The primary barrier is power versus resistance. As a vehicle approaches the sound barrier, aerodynamic drag increases exponentially. A car would need a colossal amount of thrust to push through this "wall" of air. Rocket or jet engines, like those used in specialized land-speed record vehicles, are required, not the internal combustion or electric motors found in consumer cars. Furthermore, at near-sonic speeds, shockwaves can cause catastrophic loss of control. Tires would need to withstand unimaginable centrifugal forces, and any small imperfection on the surface would be catastrophic.

A specialized, jet-powered vehicle called the ThrustSSC did break the sound barrier on land in 1997, reaching 763 mph. However, this was a 10-ton machine built like a jet fighter without wings, not a car in any conventional sense. It demonstrates the sheer scale of effort required.

Vehicle / Concept	Top Speed (mph)	Speed of Sound (Mach 1) at Sea Level	Percentage of Speed of Sound
Typical Family Sedan	110-130 mph	767 mph	~16%
Bugatti Chiron Super Sport	304.7 mph	767 mph	~40%
ThrustSSC (Land Speed Record)	763 mph	767 mph	99.5% (Mach 1.02)
Theoretical "Sonic Car"	767+ mph	767 mph	100% (Mach 1)

In short, while a one-off, rocket-powered vehicle has achieved supersonic speeds on the ground, the physics and technology required place it in a completely different category from any car you could ever drive on a public road.

[KalebLynn]

Not a chance with anything you can buy. The fastest production cars top out around 300 mph. The speed of sound is over 760 mph. To even get close, you'd need a jet engine and a miles-long, perfectly flat salt flat to run it on. Regular car tires would disintegrate long before you hit that speed. It's a cool thought experiment, but it's firmly in the realm of science fiction for consumer vehicles.

[MacJulian]

From a physics standpoint, it's practically impossible for a conventional car. The energy required to overcome the sound barrier is immense. As you approach Mach 1, air can no longer flow smoothly around the vehicle, creating a wall of pressure. A car's shape is not designed to handle the resulting shockwaves, which would likely cause it to lift off the ground or break apart. The ThrustSSC succeeded because it was essentially a grounded jet engine with a stable, slender design, something no production car replicates.

[LeLayla]

Not a chance with anything you can buy. The fastest production cars top out around 300 mph. The speed of sound is over 760 mph. To even get close, you'd need a jet engine and a miles-long, perfectly flat salt flat to run it on. Regular car tires would disintegrate long before you hit that speed. It's a cool thought experiment, but it's firmly in the realm of science fiction for consumer vehicles.

[DelBriella]

I think people forget how fast 767 mph really is. That's faster than most commercial airliners fly. Even if you could build a car with enough power, where would you drive it? There's no road on Earth long enough or smooth enough to attempt it. The forces involved would be terrifying; a pebble on the "road" would hit like a cannonball. It's one of those limits that separates a car from a specialized aircraft or a spacecraft. It's just not what cars are built for.

[McCourtney]

The only time it's been done was with the ThrustSSC back in 1997, a project that was more about engineering glory than automotive development. It was a massive, noisy, fuel-guzzling machine that required a huge team and vast desert. For a production car, the challenges are cost, safety, and purpose. Automakers invest in efficiency, autonomy, and range—not in achieving supersonic speeds that have no practical application for consumers. The technology is fascinating, but it's not a realistic goal for the auto industry.