2.7 Biturbo vs 2.5 TFSI I5

Side-by-side reliability comparison

Higher reliability score
2.5 TFSI I5 BUY 83/100
+28 points over 2.7 Biturbo
0 / 100
CAUTION 2.7 Biturbo Audi
0 / 100
BUY 2.5 TFSI I5 Audi

Specifications

2.7 Biturbo
2.5 TFSI I5
Brand
Audi
Audi
Verdict
CAUTION
BUY
Reliability
55
83
Years
1999--2005
2009--present
Displacement
2671 cc
2480 cc
Layout
V6
I5
Type
Petrol Turbo
Petrol Turbo
Power
265--380 hp
340--400 hp
Known Issues
2
2
Total Risk Cost
€2,000--€6,000
€700--€1,600

Character

2.7 Biturbo

"C5 S4/RS4, B5 S4. Twin K03/K04 turbos. Turbo failure common. Oil sludge if neglected. Coolant pipes. RS4 variant hugely powerful but maintenance-intensive. Specialist only."

2.5 TFSI I5

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

Issues Comparison

2.7 Biturbo 2

◆ CRITICAL
Twin turbo failure (K03/K04) €1,500--€4,000 80,000 km--150,000 km
▲ HIGH
Oil sludge formation €500--€2,000 60,000 km--120,000 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

2.7 Biturbo 2

A4 B5 1997--2002 A4 B5 2000--2001

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 2.7 Biturbo Report Full 2.5 TFSI I5 Report