What BHP Is My Car? How to Check Your Car’s Horsepower by Reg

If you have ever looked at a car advert and wondered “what BHP is my car?” — or typed “how much BHP does my car have” into Google before renewing your insurance — you are not alone. BHP is one of the most quoted numbers in motoring, yet most owners have never actually checked their own car’s figure.

The direct answer: BHP stands for brake horsepower, and it measures how much power your engine produces. The fastest way to find your car’s BHP is to run a free registration check that returns the car’s engine and power data — you can check your car’s full specification by reg here. You can also work it out from your V5C log book (newer certificates show maximum net power in kW, which converts to BHP), from the owner’s manual, or from the manufacturer’s published specification for your exact model and engine.

In this guide we explain what BHP really means, how it differs from HP, PS and kW, how to find the figure for your own car step by step, and how much horsepower a typical UK car actually needs.

What Does BHP Mean?

BHP (brake horsepower) is a unit of power. In simple terms, it tells you how much work the engine can do — how hard it can push the car along. The “brake” part of the name comes from the device originally used to measure it: a brake (a type of dynamometer) applied to the engine’s output shaft, measuring power at the flywheel before losses through the gearbox and wheels.

One horsepower was originally defined by James Watt as the power needed to lift 33,000 pounds one foot in one minute — roughly the sustained output of a strong working horse. Modern engines are a little more impressive: a small city car produces around 70–100 BHP, while a modern performance car can produce 400 BHP or more.

When people ask “what horsepower is my car?”, they almost always mean the BHP figure quoted by the manufacturer. For modern cars, BHP and HP are effectively the same number (we explain the tiny technical difference below), which is why the terms are used interchangeably in adverts, reviews and insurance quotes.

BHP vs HP vs PS vs kW: What Is the Difference?

Manufacturers quote power in four different units, which is where most of the confusion comes from. A German brochure will usually quote PS, an official UK document may quote kW, and a British advert will quote BHP. Here is how they compare:

Unit	What it stands for	Conversion	Where you will see it
BHP	Brake horsepower	The UK standard figure	UK adverts, reviews, insurance
HP	Horsepower	Practically identical to BHP for modern cars	Older adverts, American sources
PS	Pferdestärke (metric horsepower)	1 PS = 0.986 HP — so 125 PS ≈ 123 BHP	European manufacturer brochures
kW	Kilowatts	1 kW = 1.341 HP — so 100 kW ≈ 134 BHP	V5C log books, official documents, electric cars

Two points are worth remembering. First, the difference between BHP and HP on a modern car is so small that for insurance, comparison and buying purposes you can treat them as the same. Second, PS is always a slightly smaller unit than BHP, so a car quoted at 150 PS is actually about 148 BHP — a difference of roughly 1.4%. With kW, the conversion matters more: multiply kW by 1.341 to get BHP, or divide BHP by 1.341 to get kW.

How Much BHP Does My Car Have? Four Ways to Find Out

1. Check by registration number (quickest)

The quickest route is a registration-based specification check. Enter your number plate and the service looks up the exact vehicle — make, model, engine size and power output — from official vehicle data. This matters because the same model name can hide several engines: a Ford Fiesta, for example, has been sold with outputs from around 70 PS to 200 PS depending on the version. A reg check removes the guesswork by identifying your specific car. You can run a free car spec check by reg on MOTBuddy to see your car’s details.

While you are checking figures, it is also worth reviewing the car’s test background — a free MOT history check shows every past test result, failures and advisories recorded against the vehicle, which is just as important as the power figure if you are buying or selling.

2. Look at your V5C log book

Your V5C registration certificate holds a lot of useful data: engine capacity (cc), CO2 emissions, fuel type and the date of first registration — all confirmed by the DVLA. What it does not usually show is a figure labelled “BHP”. However, many newer V5C certificates do include a “max net power (kW)” entry in the technical details section. If yours shows one, simply multiply the kW figure by 1.341 to get BHP. For example, a max net power of 92 kW works out at about 123 BHP.

If your V5C has no power figure at all (common on older certificates), use one of the other methods here. You can read more about what the log book contains on the official GOV.UK V5C log book page.

3. Owner’s manual or manufacturer specification

Every owner’s manual includes a technical specifications section listing the engine’s power output, usually in both kW and PS. If you no longer have the handbook, the manufacturer’s website will carry the specification sheet for your model — just make sure you match the exact engine, gearbox and model year, because outputs changed between facelifts. Online owner’s manuals are normally free to download from the manufacturer’s support pages if you enter your model and year.

4. VIN plate or a dealer

The VIN (vehicle identification number) identifies your car’s exact build specification. A main dealer — or an independent garage with access to manufacturer data — can decode the VIN and confirm the factory power output. This is the most reliable route for imports, older cars, or vehicles where the documents and the car do not seem to match. The VIN itself is usually visible at the base of the windscreen, on the driver’s door frame, or stamped in the engine bay.

Worked Example: Turning a Spec Sheet into BHP

To show how this works in practice, here are two of Britain’s best-selling cars with their manufacturer-published figures (examples from the manufacturers’ official specifications):

• Ford Fiesta 1.0 EcoBoost: quoted by Ford at 125 PS. Multiply by 0.986 and you get approx. 123 BHP. The same engine was also sold in 100 PS (≈99 BHP) and 140 PS (≈138 BHP) versions — which is exactly why the model name alone never tells you the answer.
• Volkswagen Golf 1.5 TSI: quoted by Volkswagen at 130 PS, which converts to approx. 128 BHP (and about 96 kW).

So if you are asking “what horsepower is my car?” the honest answer always depends on the precise engine fitted — not just the badge on the back. That is why the reg-based check in method 1 is the safest shortcut: it identifies the exact variant registered with the DVLA.

Typical BHP Ranges: How Much Is Normal?

If your figure sounds low or high, compare it with the typical ranges below. These are broad, typical ranges for modern petrol and diesel cars sold in the UK — individual models vary:

Type of car	Typical BHP range	Examples of the class
City car	~70–100 BHP	Small hatchbacks for town driving
Family hatchback	~110–150 BHP	Fiesta/Golf-sized cars
Family SUV / crossover	~150–250 BHP	Larger bodies need more power
Hot hatch	~230–320 BHP	Performance versions of hatchbacks
Performance / sports car	400+ BHP	Dedicated sports and supercars

Electric cars are quoted in kW rather than BHP, but the same maths applies: a 150 kW electric motor is about 201 BHP. Do not be put off by a modest-sounding number on a small car, either — power only tells half the story, because a light car needs far less of it. A 95 BHP city car weighing one tonne will feel livelier than a 130 BHP SUV weighing 1.8 tonnes. This is why enthusiasts talk about “power-to-weight ratio”: BHP per tonne is often a better guide to how a car feels than BHP alone.

Why BHP Matters

Insurance cost

Every car in the UK sits in one of 50 insurance groups, and power output is one of the factors insurers consider — higher-performance cars generally sit in higher groups and cost more to insure, particularly for younger drivers. If you are comparing two versions of the same model, the lower-powered one is often noticeably cheaper to cover. Knowing your exact BHP also helps you answer insurer questions accurately; giving the wrong engine variant can cause problems if you ever need to claim.

Overtaking, motorway driving and towing

Power is what gets you safely past a lorry on an A-road, up a steep hill with a full load, or up to motorway speed on a short slip road. If you regularly tow a caravan or trailer, the combination of power and torque (see below) matters a great deal — check the car’s rated towing capacity as well as its BHP.

Resale value and buying decisions

When browsing used cars, the BHP figure is a quick filter: it tells you whether a car is the economical version or the performance version, which affects both value and running costs. If two identical-looking cars are priced differently, the engine output is often the reason.

Does higher BHP mean higher car tax?

No. Under the current UK rules for cars first registered on or after 1 April 2017, vehicle tax (VED) is based on CO2 emissions for the first year only; after that, most petrol and diesel cars pay a flat standard rate regardless of power, with an additional supplement for the first five years on cars with a list price over £40,000. So a 300 BHP car pays the same standard rate as a 100 BHP car of the same age and fuel type. BHP itself has never been a direct part of the tax calculation.

BHP vs Torque: What Is the Difference?

If BHP is how fast the engine can work, torque is how hard it can twist. Torque is measured in Newton metres (Nm) in the UK (or lb-ft in older figures) and it is what you feel as pulling power — the shove in your back when you accelerate, and the ability to haul weight without changing down a gear.

A simple way to remember it: torque gets you moving, power keeps you accelerating. Diesel and electric cars often produce modest BHP but strong torque, which is why they can feel effortlessly quick at low speeds. Petrol performance cars tend to chase high BHP figures at high revs. For everyday driving, a healthy torque figure delivered low in the rev range usually matters more than the headline BHP number.

Power also connects to how a car behaves at test time. An engine that is down on power — through a worn turbo, a blocked filter or another fault — will often show symptoms long before the MOT, and past defects can hint at how the car has been maintained; our guide to the most common MOT failure reasons in the UK shows what testers flag most often. And if you want to make sense of a car’s past results before you buy, our walkthrough on how to read an MOT history report explains every section in plain English.

What Is a Good BHP for a Family Car?

This is one of the most common questions buyers ask, and the honest answer is: less than you might think. For a typical family hatchback or estate carrying two adults, children and luggage, somewhere between 110 and 150 BHP is the sweet spot. That is enough for relaxed motorway cruising, confident overtaking and reasonable fuel economy, without pushing the car into a higher insurance group.

Below about 100 BHP, a fully loaded family car can feel strained on hills and short slip roads. Above 180 BHP you are into warm or performance territory — fun, but rarely necessary for the school run, and usually accompanied by higher fuel, tyre and insurance costs. Remember to weigh the figure against the car’s size: 120 BHP in a compact hatchback feels brisk, while the same output in a seven-seat SUV will feel merely adequate. If in doubt, the power-to-weight figure (BHP divided by the car’s weight in tonnes) is the number to compare — around 100 BHP per tonne is comfortable for family use.

Can a Car’s BHP Change Over Time?

The figure in the brochure is the output when the car left the factory. As engines age, power can quietly drop away: worn turbochargers, carbon build-up in intake systems (a known issue on some direct-injection petrol and diesel engines), tired sensors and neglected servicing can all rob an engine of some of its original output. Regular oil changes, fresh filters and fixing small faults promptly are the best way to keep the car feeling as strong as it should.

The opposite also happens: some owners have their engines remapped (also called chipping or tuning) to increase power. A remap can add 20% or more to a turbocharged engine’s output, but it is a modification that must be declared to your insurer — an undeclared remap can invalidate your policy. Modified cars can also face closer scrutiny at resale and may put extra strain on clutches, brakes and gearboxes that were designed for the standard output. If you are buying a used performance car, it is worth asking directly whether it has been remapped, and checking that the paperwork reflects it.

Finally, bear in mind that the way power is measured has changed slightly over the decades, so BHP figures for classics and older cars are not always directly comparable with modern ones. For anything built in the last twenty years, though, the published figure is a reliable guide to how the car will perform.

Check Your Car’s Spec Free

Now you know what the numbers mean, finding yours takes under a minute. Enter your registration to see your car’s specification — including its engine and power details — and make sure the figures on your documents, your insurance and any advert actually match the car in front of you.

Check your car’s spec free by reg →