4.2 V8 FSI vs 2.5 TFSI I5

Side-by-side reliability comparison

Higher reliability score
2.5 TFSI I5 BUY 83/100
+35 points over 4.2 V8 FSI
0 / 100
CAUTION 4.2 V8 FSI Audi
0 / 100
BUY 2.5 TFSI I5 Audi

Specifications

4.2 V8 FSI
2.5 TFSI I5
Brand
Audi
Audi
Verdict
CAUTION
BUY
Reliability
48
83
Years
2003--2015
2009--present
Displacement
4163 cc
2480 cc
Layout
V8
I5
Type
Petrol Na
Petrol Turbo
Power
350--450 hp
340--400 hp
Known Issues
0
2
Total Risk Cost
€0--€0
€700--€1,600

Character

4.2 V8 FSI

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

2.5 TFSI I5

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

Issues Comparison

4.2 V8 FSI 0

No documented issues.

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

4.2 V8 FSI 9

A6 C5 1999--2003 A6 C5 1999--2005 Q7 4L 2006--2015 A6 C5 2002--2004 A4 B6/B7 2006--2008 A8 D3 2006--2010 R8 Type 42 2007--2012 A4 B8 2012--2015 A5 8T 2010--2016

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 4.2 V8 FSI Report Full 2.5 TFSI I5 Report