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FORZA HORIZON 6
Engine Swap Guide
Compare the full engine inventory, sort the data, and decide which swaps deserve a test.
Engine Swap Guide
No engine is automatically best in every chassis. PI cost changes with the car, drivetrain, tire setup, and class. This ranking is a list of engines I would test first, not a promise that the same swap wins every build. The real comparison is the finished car at the same class cap.
S TIER — TEST FIRST
Usually strong PI value, power-to-weight, or upgrade range.
A TIER — STRONG CANDIDATE
Compare directly with the S-tier option and the stock engine.
B TIER — CHASSIS DEPENDENT
Use when weight balance, class fit, or a specific powerband makes sense.
C / D TIER — SPECIALIZED
Usually heavy, PI-expensive, traction-limited, or intended for top-speed and novelty builds.
Engine Swap Guide — Full Current Inventory
Stock and maximum horsepower are a comparison aid, not the reason for the tier. A complete build at the class cap is the real test.
Select any column heading to sort the inventory.
| Engine | Stock hp | Max hp | Tier | My first read |
|---|---|---|---|---|
| 1.0L I4 motorbike | 215 | 794 | A | Strong candidate. |
| 1.1L V4 motorbike | 214 | 775 | A | Strong candidate. |
| 1.2L I3 motorbike | 180 | 574 | A | Strong candidate. |
| 1.3L 2 Rotor | 232 | 630 | A | Light/high-rev candidate. |
| 1.4L I4 motorbike | 196 | 292 | A | Light/high-rev candidate. |
| 1.6L I3-T | 257 | 626 | B | Chassis dependent. |
| 1.6L I4 VVT | 182 | 541 | S | Test first. |
| 1.6L I4 Turbo Rally | 300 | 668 | A | Strong candidate. |
| 1.6L V6-T | — | 1086 | D | Special-purpose. |
| 1.8L I4 Twin Charged | 247 | 624 | B | Chassis dependent. |
| 2.0L F4 Turbo | 278 | 574 | B | Chassis dependent. |
| 2.0L F4 Turbo Rally | 330 | 645 | S | Test first. |
| 2.0L I4 VVT | 212 | 720 | A | Strong candidate. |
| 2.0L I4-T (250 hp) | 250 | 699 | B | Chassis dependent. |
| 2.0L I4-T (315/717) | 315 | 717 | B | Chassis dependent. |
| 2.0L I4-T (315/573) | 315 | 573 | B | Chassis dependent. |
| 2.0L R3 | 458 | 1000 | B | Chassis dependent. |
| 2.0L R3-T | — | 1000 | D | Special-purpose. |
| 2.2L I4-T | — | 949 | D | Special-purpose. |
| 2.4L F4 | 228 | 689 | B | Chassis dependent. |
| 2.5L F4 Turbo | 305 | 593 | B | Chassis dependent. |
| 2.5L F4-T | 341 | 731 | B | Chassis dependent. |
| 2.5L I5 Turbo | 375 | 863 | B | Chassis dependent. |
| 2.5L I5-T | 394 | 833 | B | Chassis dependent. |
| 2.5L I6-T | 276 | 1150 | A | Strong candidate. |
| 2.6L I6-TT | 281 | 758 | B | Chassis dependent. |
| 2.6L 4 Rotor Racing | 690 | 763 | A | Strong candidate. |
| 2.9L V6-TT | 444 | 927 | B | Chassis dependent. |
| Racing 3.0L I6T | 805 | 1270 | A | Strong candidate. |
| 3.0L I6-TT (320 hp) | 320 | 1599 | A | Strong candidate. |
| 3.0L I6-TT (503 hp) | 503 | 938 | B | Chassis dependent. |
| 3.0L V6-TT (621 hp) | 621 | 959 | B | Chassis dependent. |
| 3.0L V6-TT (1042 hp) | 1042 | 1173 | C | Usually PI/traction limited. |
| 3.0L V8 Racing | 475 | 774 | A | Strong candidate. |
| 3.2L I6 | 321 | 760 | S | Test first. |
| 3.2L F6TT | 536 | 1194 | B | Chassis dependent. |
| Racing V6 | 360 | 758 | A | Light/high-rev candidate. |
| 3.5L V6-PDSC | 400 | 869 | B | Chassis dependent. |
| 3.5L V8TT | 550 | 1072 | B | Chassis dependent. |
| Racing V6TT | 914 | 1460 | C | Usually PI/traction limited. |
| 3.5L TT Hybrid | 573 | 1015 | C | Heavy/specialized. |
| 3.8L V6-TT | 600 | 1101 | A | Strong candidate. |
| 3.8L F6TT | 691 | 1110 | B | Chassis dependent. |
| 4.0L F6 | 518 | 949 | B | Chassis dependent. |
| 4.0L V8 | 414 | 867 | S | Test first. |
| 4.0L V8-TT (591 hp) | 591 | 858 | B | Chassis dependent. |
| 4.0L V8-TT (700 hp) | 700 | 1057 | B | Chassis dependent. |
| 4.0L V8-TT (720 hp) | 720 | 1209 | B | Chassis dependent. |
| 4.0L V8-TT (755 hp) | 755 | 1164 | B | Chassis dependent. |
| 4.0L V8-TT (986 hp) | 986 | 1382 | C | Usually PI/traction limited. |
| 4.2L V8 | 442 | 961 | A | Strong candidate. |
| 4.4L V8-TT (552 hp) | 552 | 833 | B | Chassis dependent. |
| 4.4L V8-TT (626 hp) | 626 | 900 | B | Chassis dependent. |
| 4.5L V8 | 562 | 914 | A | Strong candidate. |
| 4.6L V8 Hybrid | 887 | 1441 | C | Heavy/specialized. |
| 4.7L V8 | 450 | 858 | B | Chassis dependent. |
| Racing V12 | 750 | 1191 | S | Test first. |
| 4.8L V10 | 552 | 1281 | A | Strong candidate. |
| 5.0L V8 | 610 | 1052 | B | Chassis dependent. |
| 5.0L V8-TT | 999 | 1447 | C | Usually PI/traction limited. |
| 5.0L V10 | 500 | 912 | B | Chassis dependent. |
| 5.1L V8 TT | — | 1341 | D | Special-purpose. |
| 5.2L V8 | 526 | 1072 | A | Strong candidate. |
| 5.2L V10 (602 hp) | 602 | 1215 | S | Test first. |
| 5.2L V10 (643 hp) | 643 | 790 | B | Chassis dependent. |
| 5.2L V12 | 455 | 758 | B | Chassis dependent. |
| 5.2L V12-TT | 608 | 1089 | B | Chassis dependent. |
| 5.5L V8 | 670 | 1234 | B | Chassis dependent. |
| 5.8L V8-DSC | 662 | 1042 | B | Chassis dependent. |
| 6.0L V12 Racing | 739 | 1144 | A | Strong candidate. |
| 6.0L V12 | 756 | 1531 | C | Usually PI/traction limited. |
| 6.0L W12TT | 700 | 1081 | C | Heavy/specialized. |
| 6.1L V12 | 627 | 1437 | C | Usually PI/traction limited. |
| 6.2L V8 (455 hp) | 455 | 925 | S | Test first. |
| 6.2L V8 (510 hp) | 510 | 1002 | S | Test first. |
| 6.2L V8-DSC | 638 | 977 | B | Chassis dependent. |
| 6.2L V8 DSC (707 hp) | 707 | 1050 | B | Chassis dependent. |
| 6.2L V8-PDSC | 755 | 1114 | B | Chassis dependent. |
| 6.3L V12 Hybrid | 1036 | 1418 | C | Heavy/specialized. |
| 6.5L V12 (700 hp) | 700 | 1515 | C | Usually PI/traction limited. |
| 6.5L V12 (1001 hp) | 1001 | 1380 | C | Usually PI/traction limited. |
| 6.5L V12 (1140 hp) | 1140 | 1559 | C | Usually PI/traction limited. |
| 6.7L V8T Diesel | 475 | 1049 | C | Heavy/specialized. |
| 7.0L V8-H | 425 | 826 | B | Chassis dependent. |
| 7.0L V12 | 820 | 991 | B | Chassis dependent. |
| Racing 7.2L V8 | 850 | 1356 | S | Test first. |
| 7.2L V8 | 1000 | 1876 | D | Special-purpose. |
| 7.4L V8TT | — | 1750 | D | Special-purpose. |
| 7.7L V12 | 800 | 1307 | B | Chassis dependent. |
| 8.4L V10 | 640 | 1127 | S | Test first. |
| 8.9L V8 DSC | — | 1500 | D | Special-purpose. |
| 12.8L I6T Diesel | 1080 | 1609 | D | Special-purpose. |
| 2400BHP 12.8L I6T Diesel | 2400 | 2400 | D | Special-purpose. |