6.0 W12 vs 2.5 TFSI I5

Side-by-side reliability comparison

Higher reliability score
2.5 TFSI I5 BUY 83/100
+41 points over 6.0 W12
0 / 100
AVOID 6.0 W12 Audi
0 / 100
BUY 2.5 TFSI I5 Audi

Specifications

6.0 W12
2.5 TFSI I5
Brand
Audi
Audi
Verdict
AVOID
BUY
Reliability
42
83
Years
2003--2010
2009--present
Displacement
5998 cc
2480 cc
Layout
V12
I5
Type
Petrol Na
Petrol Turbo
Power
450 hp
340--400 hp
Known Issues
2
2
Total Risk Cost
€3,300--€10,900
€700--€1,600

Character

6.0 W12

"D3 A8 W12, Phaeton. Two VR6 blocks merged. 4 timing chains. Ignition coil failures (12). Oil leaks everywhere. Coolant system complex. Beautiful engineering nightmare. Parts extinct in some markets."

2.5 TFSI I5

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

Issues Comparison

6.0 W12 2

◆ CRITICAL
4 timing chains + guides €3,000--€10,000 80,000 km--150,000 km
● MODERATE
Ignition coil failure (12 coils) €300--€900 40,000 km--80,000 km

2.5 TFSI I5 2

○ MINOR
Wastegate rattle (2015-2018 production) €300--€800 20,000 km--80,000 km
○ MINOR
Carbon buildup (DI engine) €400--€800 60,000 km--120,000 km

Models

6.0 W12 1

A8 D3 2003--2010

2.5 TFSI I5 5

Ducato 250/290 2011--present TT 8J 2009--2014 Q3 8U 2013--2018 A3 8Y 2022--present TT RS 2.5 TFSI 8S 2016--2023 Coupe
Full 6.0 W12 Report Full 2.5 TFSI I5 Report