Mercedes-Benz 122ci Engine Specs

Bore, stroke, displacement and compression for the Mercedes-Benz 122ci. Plus rod ratio, mean piston speed and cylinder head specs where published.

At a glance

Displacement	122 ci
Cylinders	4
Advertised power	255 hp
Years	2022–2026

This engine

Engine	Displacement	Bore × Stroke	CR	HP
M254	122 ci	—	—	255

Factory cars with a Mercedes-Benz 122ci

• Mercedes-Benz C-Class: 2022, M254, 255 hp; 2023, M254, 255 hp; 2024, M254, 255 hp; 2025, M254, 255 hp; 2026, M254, 255 hp
• Mercedes-Benz E-Class: 2024, M254, 255 hp; 2025, M254, 255 hp; 2026, M254, 255 hp

What varies across the family

This family is represented by a single engine in the database: 122 ci, 4 cylinders.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

← All Mercedes-Benz engines