Forza Horizon 5 Engine Swaps List: All 72 Engines

Forza Horizon 5 lets you take the engine out of one car and put it into another. This page lists 72 of those engine swaps with the car each engine comes from and roughly how much power it makes with every upgrade fitted. Below the list I explain how to do the swap and how I choose an engine.

One honest note first. I collected this list in 2022 and the power numbers are approximate. The game got new cars in later updates and may have gained engines with them, and the same engine can make a little more or less power depending on the car it goes into. So use the numbers to compare engines, and trust the upgrade screen in your game for the exact figure.

The 10 most powerful engine swaps

Two racing truck diesels sit in the top five. The 12.8L I6T Diesel from the Volvo Iron Knight reaches about 2,400 hp, and 12 engines in total go past 1,400 hp. You will not find those in every car. The game only offers each car the engines that fit it, so a small hatchback usually gets three or four choices and not the whole list.

Forza Horizon 5 engine swaps list

Each table is sorted from the least to the most powerful engine. "Comes from" is the car the engine belongs to in the game. F4 and F6 are flat (boxer) engines, T means turbo, TT twin turbo and DSC is a supercharger.

Four cylinder and rotary engines

The light engines. They are the ones to look at for a small front wheel drive car or a rally build, because they keep weight off the nose.

Six cylinder engines

This is the widest group, from classic flat sixes to the race V6 of the Hoonigan Gymkhana 10 Ford F-150 Hoonitruck, which is the strongest here at about 1,460 hp.

V8 engines

The V8 is the biggest group with 23 engines. The strongest is the 7.2L V8 from the Ford Mustang RTR at about 1,876 hp.

V10, V12 and W16 engines

Big, heavy and loud. These suit supercars and long cars that already carry their weight well. The 8.2L V10 FD from the Formula Drift #43 Dodge Viper SRT10 leads the group at about 1,737 hp.

Diesel engines

All 3 diesels come from trucks. They make huge power and they are very heavy, so they are for drag builds and for fun, not for a car that has to turn.

How to do an engine swap in Forza Horizon 5

1. Go to a Festival site or a player house and open the Cars tab, then Upgrades and Tuning.
2. Choose Custom Upgrade.
3. Open Conversion, then Engine Swap.
4. Pick an engine. The game shows you the new power, weight and PI before you pay.
5. Buy it with credits, then build the rest of the car around it.

Do the swap first. The intake, exhaust, turbo and other engine parts belong to the engine, so if you upgrade the stock engine and swap it later, you pay for those parts twice.

The same Conversion menu also has the drivetrain swap (for example to all wheel drive) and the aspiration swap (turbo or supercharger). The three work together, so look at all of them before you spend.

How I choose an engine

In a real car, the engineer never starts from "how much power can we get". They start from the rules and from what the car can put on the ground. The game works the same way.

• Start from the class. Every race has a PI limit. A swap that takes the car past the limit is useless for that race, and a swap can also lower the PI and drop a car into the class below. Check the PI number before the horsepower number.
• Watch the weight on the front. A big V12 in a small car adds weight over the front axle. The car gets faster on the straight and worse everywhere else. If the car understeers after a swap, that is why.
• Power you cannot use is slow. With rear wheel drive and 1,200 hp you spin the tyres up to fourth gear. Either pick a smaller engine or add the all wheel drive conversion.
• Match the engine to the job. For a drag car I take the most power the class allows. For a road race car I take the lightest engine that gets me to the PI limit together with tyres and aero. For a drift car I want a wide, smooth power band more than a big peak number.
• Use your ears. A swap changes the sound of the car. That is a perfectly good reason to do one. A rotary in a small coupe is slower than a V8 and I would still pick it some days.

After the swap the car needs a new tune, because the weight balance and the gearing have changed. My guide on how to tune cars in Forza Horizon 5 covers that step by step. For specific builds, see how to make the fastest car and how to make a drift car. The full Forza Horizon 5 cars list helps you find the donor cars, and if you have moved to the new game, start from my Forza Horizon 6 guide.

FAQ

How many engine swaps are there in Forza Horizon 5?

This list has 72 engines. That was the count when I collected it in 2022, and later updates may have added more. No car can use all of them. Each car only gets the engines that fit it.

What is the most powerful engine swap in Forza Horizon 5?

In this list it is the 12.8L I6T Diesel from the Volvo Iron Knight, at about 2,400 hp. The next ones are the 7.2L V8 (Ford Mustang RTR) at about 1,876 hp and the 7.4L V8TT (Funco Motorsports F9) at about 1,750 hp.

How do I swap an engine in Forza Horizon 5?

Open Upgrades and Tuning, choose Custom Upgrade, then Conversion, then Engine Swap. Pick an engine from the ones the game offers for that car and pay with credits.

Why can I not put any engine in any car?

Because the game gives every car its own short list of compatible engines. If the engine you want is not in the Engine Swap menu for your car, it cannot be fitted to that car.

Does an engine swap change the PI of the car?

Yes. A swap changes power and weight, so the PI changes with it. Most swaps raise it, and some lower it, which lets you move a car into a lower class.

Should I swap the engine before or after the other upgrades?

Before. The engine parts you bought for the old engine do not move to the new one, so swap first and upgrade after.

Do I need the donor car to use its engine?

No. You do not have to own the car the engine comes from. You buy the swap with credits in the Conversion menu.