Sigma 1.25 vs Coyote 5.0 V8

Side-by-side reliability comparison

Higher reliability score
Coyote 5.0 V8 BUY 82/100
+4 points over Sigma 1.25
0 / 100
BUY Sigma 1.25 Ford
0 / 100
BUY Coyote 5.0 V8 Ford

Specifications

Sigma 1.25
Coyote 5.0 V8
Brand
Ford
Ford
Verdict
BUY
BUY
Reliability
78
82
Years
1996--2017
2015--present
Displacement
1242 cc
4951 cc
Layout
I4
V8
Type
Petrol Na
Petrol Na
Power
60--82 hp
421--507 hp
Known Issues
1
2
Total Risk Cost
€50--€150
€500--€2,500

Character

Sigma 1.25

"Fiesta/Ka. Simple Yamaha co-developed engine. Timing chain (good). Reliable. Low power. Thermostat housing. Coil pack. Perfect first car/city car engine."

Coyote 5.0 V8

"Mustang GT. Modern pushrod-free DOHC V8. Ti-VCT dual variable timing. Exceptionally reliable for a performance V8. Oil consumption on track use. No known catastrophic weaknesses."

Issues Comparison

Sigma 1.25 1

○ MINOR
Thermostat housing crack €50--€150 60,000 km--120,000 km

Coyote 5.0 V8 2

● MODERATE
Timing chain/phaser tick (Gen 1) €500--€2,000 80,000 km--150,000 km
○ MINOR
Oil consumption on track use €0--€500 40,000 km--100,000 km

Models

Sigma 1.25 3

Fiesta Mk6 (JD/JH) 2002--2008 Fiesta Mk7 (JA8) 2008--2017 Fiesta Mk7 (JA8) 2008--2017

Coyote 5.0 V8 3

Mustang S550 2015--2023 Mustang S650 2024--present Mustang S650 2024--present
Full Sigma 1.25 Report Full Coyote 5.0 V8 Report