Porsche 718 Boxster GTS 4.0
The GTS 4.0 marks the transition to Porsche’s legendary naturally aspirated 4.0-litre flat-six producing 394 hp, revving freely to 7,800 rpm. This engine delivers a linear, addictive power delivery and a spine-tingling acoustic character that no turbocharged engine can replicate. Standard PASM Sport suspension lowered 20 mm, PTV, and Sport Chrono Package make it the most complete Boxster for driver engagement.
Key Specs
- Engine: 4.0 L NA Flat-6
- Power: 394 hp / 420 Nm
- Redline: 7,800 rpm
- 0–100 km/h: 4.5 sec (manual)
Our 2026 Porsche 718 Boxster GTS 4.0 Rating
FORPORSCHE RATING: 10/10
Pros
Naturally aspirated 4.0L flat-six returns for the GTS; engine character transforms the entire car; GTS suspension tuning makes the most of the mid-engine chassis; the Boxster at its finest.
Cons
Significantly more expensive; flat-six drinks more fuel than the turbo 4-cylinder variants.
Verdict
The definitive Boxster. The 4.0L flat-six is one of the greatest engines fitted to any sports car, and the open-top Boxster chassis makes the absolute most of it. A future classic in the making.
Porsche 718 Boxster & Cayman Powertrain Guide
- 718 Boxster: 2.0L 4-cyl Turbo / 300 hp / 280 lb-ft / 0-60: 4.9 sec
- 718 Boxster S: 2.5L 4-cyl Turbo / 350 hp / 310 lb-ft / 0-60: 4.4 sec
- 718 Boxster GTS 4.0: 4.0L H6 Naturally Aspirated / 394 hp / 310 lb-ft / 0-60: 4.0 sec
- 718 Spyder RS: 4.0L H6 Naturally Aspirated / 500 hp / 346 lb-ft / 0-60: 3.2 sec / 9,000 rpm
- 718 Cayman: 2.0L 4-cyl Turbo / 300 hp / 280 lb-ft / 0-60: 5.1 sec
- 718 Cayman S: 2.5L 4-cyl Turbo / 350 hp / 310 lb-ft / 0-60: 4.6 sec
- 718 Cayman T: 2.0L 4-cyl Turbo / 300 hp / lightweight focus / 0-60: 4.9 sec (manual)
- 718 Cayman GTS 4.0: 4.0L H6 Naturally Aspirated / 394 hp / 310 lb-ft / 0-60: 4.2 sec
- 718 Cayman GT4 RS: 4.0L H6 Naturally Aspirated / 500 hp / 346 lb-ft / 0-60: 3.2 sec / 9,000 rpm