Cylinder bore diameter

In Simple Terms

F1 engines must have cylinders with an internal diameter of exactly 80mm, with only a tiny 0.1mm tolerance allowed in either direction. This strict specification ensures all teams are working with similar engine dimensions and maintains competitive balance.

• Cylinder bore must be precisely 80mm (±0.1mm tolerance)
• This is a fundamental engine specification that all teams must follow
• The tight tolerance prevents unfair advantages through oversized cylinders
• Enforced through technical inspections and engine teardowns