The Forza Horizon 6 engine swap list includes motorcycle engines, inline engines, rotary engines, V6 swaps, V8 swaps, V10 and V12 swaps, extreme racing motors, and EV motor swaps. Engine swaps are one of the fastest ways to change how a car accelerates, sounds, launches, drifts, and fits into a Performance Index class.

For more car guides, build help, and Forza Horizon 6 tuning coverage, the complete Forza Horizon 6 hub has all related guides in one place.

What Engine Swaps Are In Forza Horizon 6

Engine swaps in Forza Horizon 6 replace a car’s original powertrain with a different motor, changing its horsepower, torque, weight balance, sound, upgrade path, and Performance Index potential.

An engine swap can turn a small car into a drag build, push a rally car into a stronger class, make a drift setup easier to control, or completely ruin a clean road build if the swap adds too much power too quickly. The swap itself is only the starting point. The real build comes from the upgrades, drivetrain choice, tires, suspension, brakes, and tuning that follow it.

Some swaps are better for keeping a car inside a useful class. Others are built for pure nonsense. A lightweight car with a huge engine can be hilarious, but it can also become useless if it spins through every gear and cannot turn cleanly. More horsepower is fun until the car starts driving like a shopping cart with trauma.

The best engine swap is the one that fits the car’s job. A drift car needs controllable power. A drag car wants launch and acceleration. A road car needs balance. A rally car needs usable torque and stability. Picking a swap without thinking about the build type is the easiest way to waste credits and create a car that only feels fast on paper.

Forza Horizon 6 Full Engine Swap List

The Forza Horizon 6 engine swap list is split across smaller motorcycle engines, inline and rotary engines, V6 and V8 swaps, V10 and V12 swaps, extreme racing swaps, and electric motor swaps.

Not every car can use every engine. Swap options depend on the car, body type, drivetrain layout, and what the game allows for that specific model. Some small cars can use motorcycle engines, some performance cars get rotary or V8 options, and some builds can move into EV motor swaps with matching battery changes.

Swap Category	Examples	Best Use
Motorcycle Engines	1.0L I4, 1.1L V4, 1.2L I3, 1.4L I4	Small cars, lightweight builds, high revving swaps.
Inline And Rotary Engines	1.3L R2, 1.6L I4, 2.0L I4 Turbo, 2.6L I6 Twin Turbo, 2.6L 4 Rotor	Tuner builds, drift setups, rally builds, balanced class builds.
V6 And V8 Engines	3.5L V6 Twin Turbo, 3.8L V6 Twin Turbo, 4.0L V8, 6.2L V8, 7.0L V8, 7.2L Racing V8	Road racing, muscle builds, offroad power, drag setups.
V10, V12, And Extreme Engines	5.2L V10, Racing V12, 7.4L V8TT	Top speed, high class racing, extreme drag, wild power builds.
EV Motor Swaps	235 BHP Motor, 670 BHP Race Motor, 1893 BHP Motor	Instant torque builds, drag cars, experimental EV conversions.

This list is best used as a planning tool, not a final build answer. The same swap can feel great in one car and terrible in another because weight, tire width, drivetrain, and class target change everything.

Motorcycle Engine Swaps

Motorcycle engine swaps are lightweight, high revving swaps usually aimed at small platforms, kei cars, and compact builds.

These swaps are not about massive torque. Their value comes from low weight, high RPM behavior, and the way they can wake up tiny cars without instantly turning them into uncontrollable power bricks. They are best for players who want a small car to feel sharper, louder, and more responsive.

Engine Swap	Listed Power	Listed Origin	Best Fit
1.0L I4	215 HP, 83 lb ft	Honda CBR1000RR R Fireblade	Lightweight compact builds.
1.1L V4	214 HP, 92 lb ft	Aprilia RSV4	High revving small car swaps.
1.2L I3	180 HP, 94 lb ft	Triumph Speed Triple 1200 RS	Lower power lightweight builds.
1.4L I4	196 HP, 113 lb ft	Suzuki GSX1300R Hayabusa	Small cars that need a sharper powerband.

Motorcycle swaps are best when the goal is fun handling and a weird build identity. They are not the first pick for pure drag racing or top speed because the bigger swaps have more obvious power. Their best use is making a small car feel alive without pushing it into complete stupidity.

Inline And Rotary Engine Swaps

Inline and rotary swaps are some of the most flexible engine swaps in Forza Horizon 6 because they can work for drift, road, rally, and tuner style builds.

This is where many of the most useful swaps sit. The 2.6L I6 Twin Turbo fits the Japanese tuner fantasy. The 4 rotor racing swap gives rotary builds a high revving edge. The 2.0L turbo options can keep a build lighter and cleaner than a huge V8 swap.

Engine Swap	Listed Power	Best Use
1.3L R2	232 HP, 159 lb ft	Rotary builds, lightweight tuner cars, style focused swaps.
1.6L I4 VVT	Varies by build	Lower class builds and clean PI control.
2.0L I4 Turbo	250 HP, 203 lb ft	Balanced turbo builds and lower to mid class racing.
2.0L F4 Turbo Rally	Varies by build	Dirt, rally, and offroad focused cars.
2.6L I6 Twin Turbo	276 HP, 289 lb ft	Japanese tuner builds and balanced high power upgrades.
2.6L 4 Rotor Racing	Varies by build	High revving race builds, drift setups, and rotary focused cars.
3.2L I6	321 HP to 333 HP	Balanced street, road, and sport builds.

These swaps are often better than huge engines when the goal is keeping a car usable. A lighter swap can preserve handling and keep the Performance Index from jumping too hard. That is especially useful when building for specific classes instead of just chasing the biggest number on the upgrade screen.

V6 And V8 Engine Swaps

V6 and V8 swaps are the main power upgrade zone for players who want stronger acceleration, bigger torque, and more aggressive builds.

The V6 swaps are useful when the car needs more power without always becoming too heavy. The V8 swaps are better for muscle builds, drag cars, high power road setups, and offroad vehicles that need torque. The 6.2L V8 is especially useful because V8 swaps often give strong power without always being as PI expensive as the most extreme engines.

Engine Swap	Listed Power	Best Use
3.5L V6 Twin Turbo	450 HP to 630 HP variants	Strong road builds, track builds, and high power swaps without going full extreme.
3.8L V6 Twin Turbo	565 HP	High performance road builds and fast tuner setups.
4.0L V8	Varies by build	Balanced V8 power with cleaner handling than heavier swaps.
6.2L V8	415 HP	Performance Index efficient power and broad build use.
7.0L V8	Varies by build	Heavy displacement builds, muscle style swaps, and torque focused cars.
7.2L Racing V8	Varies by build	Top tier road, offroad, and racing builds.

V8 swaps can be excellent, but they can also make a car harder to place into the right class. If the swap pushes the car too high in PI, there may not be enough room left for tires, brakes, weight reduction, or handling upgrades. That is where many bad builds are born. The engine looks amazing, then the car understeers into another prefecture.

V10, V12, And Extreme Engine Swaps

V10, V12, and extreme swaps are built for high class racing, top speed builds, drag cars, and wild conversions where control becomes part of the challenge.

These swaps can produce huge power, but they should not be treated as automatic upgrades. A Racing V12 can be strong for speed focused builds. A V10 can work well in road racing setups that want high RPM power. The 7.4L V8TT is the kind of swap that exists for extreme builds where the point is raw output first and sanity second.

Engine Swap	Listed Power	Best Use
5.2L V10	Varies by build	High RPM road racing and high class performance builds.
Racing V12	Varies by build	Top speed, high class road builds, and PI efficient racing setups.
7.4L V8TT	1750 HP	Extreme drag, sand, and high power stunt builds.

The best use for these swaps is a car that already has the tire, aero, and drivetrain support to handle the power. Dropping a monster swap into the wrong car can make it slower in real races because every corner becomes a negotiation with physics.

EV Motor And Battery Swaps Explained

EV motor swaps in Forza Horizon 6 replace traditional engine behavior with instant electric torque, and the battery setup affects how well the motor can deliver its peak power.

Electric swaps feel different from normal engine swaps because the power arrives instantly. That is great for launches, drag builds, hill climbs, and experimental setups. It can also make a car harder to control if the tires, suspension, and drivetrain are not built around the added torque.

EV Motor Swap	Best Use	Main Build Concern
235 BHP Motor	Compact cars, lightweight city builds, lower power EV conversions	Keeping the build light and responsive.
670 BHP Race Motor	Track focused EV builds and mid size performance cars	Balancing power with handling and weight.
1893 BHP Motor	Extreme SUVs, trucks, drag builds, and high speed experiments	Managing massive torque, battery weight, and traction.

EV swaps need more than power upgrades. Battery weight, suspension setup, tire grip, and drivetrain tuning become very important. A huge motor can make a launch feel absurd, but a bad tune can turn the car into a tire smoke machine that looks fast while going nowhere useful.

How To Engine Swap In Forza Horizon 6

To engine swap in Forza Horizon 6, select a car in the garage, open Upgrades And Tuning, enter Custom Upgrades, then look under Body Kits And Conversions for available engine swap options.

Not every car has engine swaps. Some cars have several choices, while others have limited conversion options or none at all. If the engine swap menu does not appear, that car likely does not support a swap.

Step	Menu Action
1	Go to the garage.
2	Select the car to modify.
3	Open Upgrades And Tuning.
4	Select Custom Upgrades.
5	Open Body Kits And Conversions.
6	Select Engine Swaps if the option is available.
7	Choose the swap, install it, then pay when exiting the upgrade menu.

After installing a swap, test the car before adding every upgrade possible. A swap can change the car’s balance immediately. The right move is to check how the car launches, brakes, turns, and shifts before stacking more power on top of a setup that may already need control upgrades.

Best Engine Swaps By Build Type

The best engine swap in Forza Horizon 6 depends on the build type, with different swaps working better for drag, drift, road racing, rally, and class restricted setups.

Drag builds want launch power and straight line acceleration. Drift builds need controllable torque and throttle response. Road racing builds need a balance between speed and handling. Rally builds need usable power, traction, and stability on uneven roads. Class builds need enough power to be competitive without wasting all the PI budget on the engine.

Build Type	Best Swap Direction	Why
Drag	High power V8, extreme V8TT, or strong EV motor	Launch, torque, and straight line acceleration matter most.
Drift	Rotary, inline turbo, V8, or controllable EV swap	Drift builds need power that can be held and corrected smoothly.
Road Racing	Balanced inline, V6, V8, V10, or Racing V12	Top speed and acceleration need to stay connected to handling.
Rally	2.0L rally style swap, V6, or torque focused build	Loose surfaces need usable power instead of uncontrollable output.
Class Builds	Lower weight swaps with good PI efficiency	Leaving room for tires, brakes, and handling upgrades is usually better than raw power.
Fun Builds	Motorcycle engines, 4 rotor, extreme V8TT, or EV swaps	These swaps make cars feel unique, weird, loud, or completely unwell.

For event focused car choices, the Forza Horizon 6 best cars for each race type guide is the better follow up because engine swaps only matter if the full car fits the event. For class building, the Forza Horizon 6 best cars in each class guide helps with picking stronger base cars before spending credits on conversions.

Common Engine Swap Mistakes

The biggest engine swap mistake in Forza Horizon 6 is choosing the most powerful motor before checking the car’s class target, tires, drivetrain, and handling needs.

A huge engine can make the upgrade screen look better while making the actual car worse. If the swap burns too much PI, the build may not have enough room left for racing tires, suspension, brakes, weight reduction, or drivetrain upgrades. That creates a car that is fast in a straight line and miserable everywhere else.

Another common mistake is ignoring the Aspiration tab after swapping. Some engines have different boost options, and not every swap supports the same turbo, supercharger, or aspiration choices. Checking that tab matters before deciding the build is finished.

EV swaps create their own problems. Instant torque is powerful, but it can make traction harder to manage. Bigger batteries and heavier motor setups can also change weight distribution, so suspension and differential tuning become more important.

Do not pick the biggest engine only because it has the highest number.
Check the final Performance Index before committing to the build.
Leave room for tires, brakes, suspension, and weight reduction.
Check aspiration options after choosing a swap.
Use EV swaps carefully because instant torque can overwhelm tires.
Test drive the car before stacking every power upgrade.
Match the swap to the race type instead of forcing one engine into every car.

Drift builds are especially sensitive to swap choices. A power increase can help, but too much grip loss or weight shift can make the car harder to hold through corners. The Forza Horizon 6 drifting guide is useful before turning a clean car into a smoke machine with poor manners.

For the playlist party objective, use our Forza Horizon 6 Horizon Stunt Party guide.

Final Blurb

The Forza Horizon 6 engine swap list gives players a wide range of build options, from tiny motorcycle engines and rotary swaps to V8 monsters, Racing V12s, extreme V8TT power, and EV motor conversions. The best swap is not always the biggest engine. It is the swap that fits the car’s class, event type, traction, weight, and tuning plan.

For clean builds, start with the goal first. Pick the class, choose the race type, then decide if the car needs more power, less weight, better torque, or a completely different identity. Engine swaps are one of the most fun parts of tuning in Forza Horizon 6, but they are also the fastest way to create a car that looks incredible in the menu and immediately tries to leave the road in protest.

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