Carmakers promise one thing — but reality shows another: here’s where drivers are most often misled

Every driver has noticed it at least once: the numbers in glossy brochures and spec sheets don’t always match what you get on the road. Manufacturers and dealers deliberately polish the data to make their cars look more attractive.

Fuel economy: Official fuel consumption figures almost never hold up in real-world driving. Tests are run in labs under perfect conditions — no wind, no temperature swings, no bad fuel. On the road, consumption can be 20–30% higher. Some companies have even faced lawsuits. Hyundai and Kia, for example, paid fines in the U.S. over understated fuel economy claims for 900,000 cars.

Ground clearance and inconsistent standards: In Europe, clearance is measured on a loaded vehicle, while in the U.S. it’s measured with the car empty. Peugeot, meanwhile, sometimes uses the gap between the pavement and the side sills. As a result, the same model can end up with very different numbers on paper.

Trunk volume — liters that don’t exist: Cargo capacity is typically listed in liters, but that’s a flexible metric. The European VDA standard uses small one-liter boxes to fill every corner of the trunk. In practice, you often get 1.4–3.5 cubic feet less space — sometimes as much as 5.3 cubic feet.

0–62 mph acceleration — track-only numbers: The quoted times to 100 km/h (62 mph) are achievable only under ideal conditions: smooth asphalt, brand-new tires, A/C and lights turned off. In everyday driving, cars usually take a second or two longer.

Engine power — horsepower with fine print: Even horsepower isn’t measured the same everywhere. In the U.S. and Europe, different methods are used — either at the crankshaft or at the wheels. What’s more, 100 “U.S. horsepower” equals 101.38 metric horsepower. On paper, some engines are even “detuned” to reduce taxes, which means the stated power can differ from what you actually get.

In the end, brochures are written for marketing, not precision. The real numbers only come out in independent tests and everyday driving.