Differences between GTI and R engine

The ea888 Gen3 engine found in the Mk7 Golf R boasts several upgrades versus the ea888 Gen3 found in the GTI:

Head:

• Different alloy: withstands higher thermal stress
• Hollow exhaust valves: with high Ni content and nitride coating for superior heat and wear resistance
• Improved valve seats: enhanced temperature stability and wear resistance
• Adapted exhaust camshaft: optimized valve timing

Pistons and Cooling:

• Reduced compression ratio: 9.3:1 (versus 9.5:1) with redesigned pistons
• High-flow piston cooling jets: for improved heat dissipation

Fuel Delivery:

• High-pressure DI injectors: with increased flow rate for optimal fuel injection

Turbocharging:

• Larger IHI IS38 turbocharger
• Increased charge pressure: up to 17.4 PSI (1.2 bar)
• Larger turbo charge cooler

Cooling System:

• High-performance main radiator: ensures efficient engine cooling
• 1-2 auxiliary radiators (depending on region): provide additional cooling capacity