Best Audi Engines

2.5L Turbo I5

Ducato, TT, Q3, A3, TT RS 2.5 TFSI

Legendary 5-cyl. 9x Engine of the Year. Forged internals. Surprisingly reliable.

3.0L SC V6

A5, A4, Q5, A8, A6, A7

Most reliable S-model Audi ever. Supercharged = instant. Known issues cheap. 200k+ km.

2.0L Turbo I4

A1 35 TFSI, A3 35 TFSI, A4 2.0 TFSI, A4 Avant 2.0 TFSI, A5 2.0 TFSI, A5 Sportback 2.0 TFSI, A6 2.0 TFSI, Q3 35 TFSI, Q5 2.0 TFSI

Gen 3 refined. Higher compression, better cooling. Strong long-term outlook.

2.0L Turbo I4

A4, A3, TT, Q7, A5, R8, A6 2.0 TFSI, Q3 2.0 TFSI, Q5 2.0 TFSI

Game changer. Dual injection solved carbon. Metal tensioner. 200k+ mi. Best VW Group 4-cyl.

3.0L V6 Diesel

A4, Touareg, A8, A6, Q7, A5, Q5, A7, Q7 3.0 TDI

Torque monster. Amazing highway economy. BiTDI = 313hp. Avoid city-only.

1.4L Turbo I4

A4, A3, Leon, Touran, Ibiza, Toledo, Golf, Polo, Passat, Formentor, Superb, Octavia, Tarraco, Tiguan, Kodiaq, A1 1.0 TFSI, A1 1.4 TFSI, Q2 1.4 TFSI, Q3 1.4 TFSI

Timing belt (not chain) = no stretch. Cylinder deactivation. Efficient budget Audi.

3.0L TT V6

A5, A4, Q7, Q8, Touareg, A8, A7, A6

Replaced supercharger with twin-turbo. Smoother power. Promising.

2.9 V6 Biturbo RS4/RS5 (DEZA)

A5, A4

RS4/RS5 B9. EA839 family (shared with Porsche). Hot-V design. Strong internals. Carbon buildup (DI)....

1.5L Turbo I4

Golf, Octavia, Leon, Karoq, Ateca, A3, Ibiza, Kodiaq, Arona, Formentor, A4, Touran, Polo, Taigo, Scala, Tarraco, T-Cross, A6, Passat, Caddy, Tiguan, Kamiq, Q3, Superb, Fabia, T-Roc, A1 30 TFSI, A3 1.5 TFSI, Q2 1.5 TFSI

EA211 evolution. Miller cycle. Adequate daily. Low-RPM shudder (software fix).

2.4/2.8 V6 NA

A6, A4

B5/C5 A4/A6 V6. Timing belt (not chain!) — failure destroys engine. Smooth, refined. Oil consumption...

2.0L TDI CR

A1 1.6 TDI, A3 1.6 TDI, A3 2.0 TDI, A3 Sedan 2.0 TDI, A4 2.0 TDI, A4 Avant 2.0 TDI, A5 2.0 TDI, A6 2.0 TDI, A6 Avant 2.0 TDI, Q3 2.0 TDI

Post-Dieselgate clean diesel. Common rail, refined, efficient. Strong highway cruiser. DPF care need...

3.0 V6 NA (ASN/AVK/BBJ)

A6, A8

B6/B7 A4, C5/C6 A6. Timing chain (good). Smooth, refined V6. Oil consumption at high mileage. Thermo...

2.0 NA (ALT/AWA)

A4

B6 A4. Simple NA 2.0 without turbo/FSI complexity. Timing belt (interference). Oil consumption. Adeq...

1.8T 20V Turbo I4

A4, A6, A3, TT, S80, V70, S60, S40, V50

B5 A4/Passat B5. AEB/APU/AWM codes. Oil sludge issue if intervals skipped. Turbo failure at 150k+ km...

4.0L TT V8

A8, A7, A6, Formentor, Q3, TT, A3, Q8

Flagship. 600hp. Powers Lamborghini Urus too. Expensive to fix.

4.0 TDI V8 (CZAC/DCZF) SQ7/SQ8

Q7

SQ7/SQ8. Electric compressor + twin-turbo. Most complex diesel ever made. 48V system. EGR cooler. DP...

3.2 V6 FSI

A4, TT, A5

B7/B8 A4/A6. Direct injection V6. Carbon buildup on intake valves (no walnut blast = power loss). Ti...

5.2 V10 TFSI (DECA/BUJ)

R8

RS6/RS7 C7, R8 V10 Performance. Twin-turbo V10. Carbon buildup. Turbo failure at high mileage. Coil ...

3.0L Twin-Turbo V6

Q8, Q5, A7 3.0 TFSI TT, S4 3.0 TFSI TT, S5 3.0 TFSI TT

Replaced supercharged EA837. Hot-V layout. Powerful but complex. Turbo and coolant system concerns e...

2.7 TDI V6 (BPP/CANB/CANA)

A6

C6 A6, B7 A4. Chain driven BUT chain at rear (expensive). Injector failures. DPF. EGR. Better than 2...

3.0L V6 TDI

RS6 4.0 TFSI, RS7 4.0 TFSI

Powerful V6 diesel. Earlier models: injector and turbo issues. BiTDI variants add complexity. Highwa...

5.0/5.2 V10 NA (BUH/BSM)

A6, R8

S6/S8 C6, R8 V10 NA. Lamborghini-shared V10. Carbon buildup on DI variants. Timing chain (complex). ...

2.0L Turbo I4

Golf, A3, A4, Altea, Toledo, Leon, Passat, TT, Octavia

Pioneer turbo four. Cast-iron block, great tuning base. Oil use is "feature not bug."

2.7 Biturbo V6 (AGB/AZB/ASJ)

A4

C5 S4/RS4, B5 S4. Twin K03/K04 turbos. Turbo failure common. Oil sludge if neglected. Coolant pipes....

2.0L TDI (Dieselgate)

Mechanically decent diesel tainted by emissions scandal. Software fix applied. Engine itself is reli...

4.0 TDI V8 (BTR/CCFC/CDSB)

Q7, A8

D3 A8, Q7. V8 diesel — enormous torque. Complex. Timing chain. 8 injectors = expensive. DPF. Linked ...

4.2L NA V8

A6, Q7, A4, A8, R8, A5

Glorious NA V8. B6/B7 S4 = nightmare. R8/RS5 = solid. Check application.

5.0 V10 Twin-Turbo RS6 C6

A6

RS6 C6. Twin KKK K24 turbos on Lamborghini V10 block. Most powerful Audi estate ever. Turbo failure,...

2.5 V6 TDI

A6, A4

C5 A6 2.5 TDI. Camshaft wear is catastrophic — soft cam lobes wear flat, destroying engine. Timing b...

6.0 W12 (BHT)

A8

D3 A8 W12, Phaeton. Two VR6 blocks merged. 4 timing chains. Ignition coil failures (12). Oil leaks e...

2.0L Turbo I4

A5, A4, Q5, A6, A3 2.0 TFSI

Same oil + tensioner flaws as Gen 1. CR: rebuild by 100-150k mi.

2.0L Turbo I4

A3, Golf, Ibiza, A6, Passat, Alhambra, Superb, Q3, TT, GR Yaris, A4 2.0 TFSI, Q5 2.0 TFSI

Notorious oil burning + plastic tensioner failure. Class-action. Avoid.

2.0L Turbo I4 (early)

Tiguan

Notorious oil burning, plastic timing chain tensioner failure. Multiple class-actions. Avoid unless ...