Side by side
Compare engines
Output, reliability, upkeep and tuning headroom for every engine in the catalogue — with the known failure points spelled out, not hidden.
N54
3.0L · I6 · Turbo
3.0L twin-turbo six. Huge tuning headroom, long list of weak points.
300
hp
300
lb-ft
7000
redline
Reliability score
Needs a specialist budget
- HPFP failure / long crank
- Injector leaks and misfires
- Wastegate rattle
- Walnut-blast carbon buildup
Fitted to E90 · E91 · E92 · E93 · E87 · E60
B58
3.0L · I6 · Turbo
3.0L modular turbo six — closed-deck block, very tune friendly.
382
hp
369
lb-ft
7000
redline
Reliability score
Bulletproof
- Coolant pump / thermostat
- Valve cover gasket seepage
- Charge pipe on tuned cars
- Heat soak on repeated pulls
Fitted to F30 · G20 · G21 · F20 · F22 · G42
Horsepower & cost calculator
Plan a N54 build
Pick the hardware. Power is modelled with diminishing returns against this engine's stock-internals headroom, so the numbers stay honest.
Projected output
350hp
300 hp stock · +50 hp
- Parts & labour
- $1,150
- Cost per hp
- $23
Comfortably within stock-hardware territory.