What the automobile land speed record actually is

The automobile land speed record is the fastest speed ever driven by a wheeled vehicle on land, measured over a measured distance and verified by official observers. It is not a single number — different organizations recognize different records depending on the engine type, fuel used, and whether the car is street-legal. The most famous record is the one tracked by the Fédération Internationale de l'Automobile (FIA), the international governing body for motorsport, which requires the run to happen on a closed course with timing equipment and independent witnesses.

The current FIA land speed record stands at 763 miles per hour, set in 1997 by a jet-powered car called ThrustSSC. That car was the first to break the sound barrier on land. However, other organizations recognize different records — the Southern California Timing Association (SCTA) recognizes records for naturally aspirated engines, supercharged engines, and other categories, and those records are considerably lower because they exclude jet and rocket power.

Understanding which record is which matters because the rules that govern them are completely different. A car that holds the SCTA record for a piston engine cannot hold the FIA record, because the FIA record allows jet engines. The FIA record is the one most people mean when they say "the land speed record," but it is also the one that requires the most extreme engineering and the most money.

Key Takeaways

  • The FIA land speed record, currently 763 miles per hour, is held by ThrustSSC, a jet-powered car that ran in 1997.
  • Different organizations recognize different records based on engine type and fuel — the SCTA recognizes records for piston engines, supercharged engines, and other categories separately.
  • An official land speed record run requires a measured course, timing equipment, and independent observers to verify the speed.
  • The car must make two runs in opposite directions within a set time window, and the average of those two runs becomes the official record.

How the FIA measures and verifies a land speed record

To set an FIA land speed record, a car must run on a closed course — usually a salt flat, a dry lakebed, or a specially prepared runway — over a measured distance. The FIA requires the course to be at least 10 kilometers (about 6.2 miles) long, with a measured mile or kilometer in the middle where the actual speed is clocked. Timing equipment must be electronic and certified, and independent observers from the FIA must be present to witness the run and sign off on the results.

The car must make two runs in opposite directions within a set time window, usually one hour. The FIA then averages the speeds of both runs to determine the official record. This two-run requirement exists to account for wind, slope, and other environmental factors that might favor one direction over the other. If the two runs differ by more than 10 percent, the record attempt fails and the team must try again.

The FIA also requires the car to be a land vehicle — it must have wheels and be powered by an engine or motor, not by a jet or rocket engine alone. Wait — that is not quite right. The FIA does allow jet engines, but the car must still have wheels and must still be steered by a driver. A pure rocket sled, with no wheels and no steering, would not count. The distinction matters because it keeps the record in the realm of "cars" rather than "experimental aircraft on the ground."

The difference between FIA records and SCTA records

The SCTA, based in Southern California, recognizes land speed records for cars that run on the same salt flats and lakebeds as FIA attempts, but with different rules. The SCTA does not allow jet engines or rocket engines — only piston engines, supercharged engines, and electric motors. Because of that restriction, SCTA records are much lower than the FIA record. The current SCTA record for a naturally aspirated piston engine is around 633 miles per hour; the record for a supercharged piston engine is around 675 miles per hour.

The SCTA also recognizes records in many more categories than the FIA does. There are separate records for different engine sizes, different fuel types, different body styles, and different power sources. This means a team can hold an SCTA record without holding the FIA record, and vice versa. A team chasing the FIA record is usually not competing for an SCTA record at the same time, because the two organizations have different rules and different courses.

For someone interested in land speed records, the distinction matters because the SCTA records are more accessible — they do not require jet engines or unlimited budgets. Teams have been setting SCTA records for decades, and new records in various categories are set more often than FIA records. The FIA record, by contrast, has only been broken a handful of times in the past 50 years.

Why land speed records require such extreme engineering

A car that runs 763 miles per hour faces forces that ordinary cars never encounter. At that speed, air resistance becomes the dominant force — the car must push through air with the force of a jet engine, which is why most land speed record cars actually use jet engines. The car must also be extremely light, because weight directly reduces acceleration and top speed. ThrustSSC, the current FIA record holder, weighs about 10 tons but produces 110,000 horsepower — roughly 50 times the power of a high-performance sports car.

The tires must be specially designed to handle the speed and the heat generated by friction. At 763 miles per hour, a tire can heat up to over 2,000 degrees Fahrenheit. The car must also be aerodynamically shaped to reduce drag and provide downforce — the force that keeps the car pressed to the ground. A poorly shaped car can become unstable and flip or veer off course at high speed.

The driver also faces extreme conditions. At 763 miles per hour, the car travels over a mile every 4.7 seconds. The driver experiences forces that can exceed 5 Gs — five times the force of gravity — which can cause blackouts or injury. The driver must wear a pressure suit similar to those worn by fighter pilots, and the cockpit must be pressurized to protect the driver from the extreme air pressure outside.

Where land speed record attempts take place

Land speed record attempts almost always happen on salt flats or dry lakebeds, because these surfaces are flat, hard, and long enough to accommodate a 10-kilometer measured course. The most famous location is the Bonneville Salt Flats in Utah, where most SCTA records are set and where several FIA records have been set. Other locations include the Black Rock Desert in Nevada, where ThrustSSC set the current FIA record, and various salt flats in Australia and South Africa.

These locations are chosen because they offer a naturally flat, hard surface that can support a heavy car at extreme speeds. A salt flat is essentially a dried-up lake bed covered in a crust of salt and minerals. The surface is hard enough to support the car's weight but smooth enough to allow the car to reach its maximum speed without bouncing or losing traction. Bonneville is particularly popular because it is accessible, well-established, and has been used for land speed records since the 1930s.

The history of the land speed record and how it has changed

The land speed record has been broken many times since the first official record was set in 1898 at 39 miles per hour. For the first 50 years, the record was held by cars with piston engines — the fastest piston-engine record car reached about 634 miles per hour in 1965. Then jet engines entered the picture. In 1970, a jet-powered car called Blue Flame set a record of 622 miles per hour, and in 1983, ThrustSSC's predecessor, Thrust2, set a record of 633 miles per hour with a jet engine.

The jump from piston engines to jet engines happened because jet engines produce far more power than piston engines of the same weight. A piston engine is limited by how fast the pistons can move up and down — there is a physical limit to how many explosions can happen per second. A jet engine has no pistons; it straightforward compresses air, burns fuel, and expels the hot gases out the back. This allows a jet engine to produce vastly more power, which is why all the fastest land speed record cars use jet engines.

The current record of 763 miles per hour has stood since 1997, making it one of the longest-standing records in motorsport. Several teams have attempted to break it, but the engineering challenges and the cost — often over $10 million per attempt — have prevented anyone from succeeding. The next attempt is likely to come from a team called Bloodhound LSR, which has been in development for over a decade and aims to reach 1,000 miles per hour.

How land speed records relate to other speed records

The automobile land speed record is different from other speed records because it measures the speed of a wheeled vehicle on land. There are separate records for water speed (held by a jet-powered boat at 317 miles per hour), air speed (held by a jet aircraft at over 2,000 miles per hour), and rail speed (held by a maglev train at 374 miles per hour). Each record is governed by different organizations and follows different rules.

The land speed record is also different from drag racing records, which measure acceleration over a quarter-mile rather than top speed over a longer distance. A drag racing car might reach 330 miles per hour in a quarter-mile, but it is not trying to maintain that speed — it is trying to accelerate as fast as possible. A land speed record car, by contrast, must maintain its speed over a full kilometer to be measured accurately.

Frequently Asked Questions

Who currently holds the land speed record?

ThrustSSC, a jet-powered car driven by Richard Noble, holds the FIA land speed record at 763 miles per hour, set in 1997 in the Black Rock Desert in Nevada. The SCTA recognizes different records depending on engine type — the fastest SCTA record is around 675 miles per hour for a supercharged piston engine.

Can a street-legal car hold the land speed record?

No. The land speed record requires a closed course with measured timing equipment and independent observers. A street-legal car could theoretically be used, but it would need to be modified for the run, and the FIA allows jet engines anyway, so street-legal cars are not competitive.

How long does a land speed record attempt take?

The actual runs take only a few minutes — at 763 miles per hour, the car covers the measured mile in about 4.7 seconds. However, the entire attempt, including setup, calibration, and two runs in opposite directions, can take several hours or even days depending on weather and equipment issues.

Why do land speed record cars need to make two runs?

The two runs in opposite directions allow the FIA to average out the effects of wind, slope, and other environmental factors. If one direction has a tailwind, the other direction will have a headwind, so the average of the two runs gives a more accurate measure of the car's true speed.

What happens if a land speed record attempt fails?

If the two runs differ by more than 10 percent, or if timing equipment fails, or if the car goes off course, the attempt is disqualified and the team must try again. Teams often make multiple attempts over several years before successfully setting a record.