Mercedes-Benz M133 engine

The M133 is a turbocharged inline-four engine produced by Mercedes-Benz. Since its debut in 2013, it has been awarded International Engine of the Year three times in the "Best New Engine" and "1.8-litre to 2-litre" categories.^[1]

Mercedes-Benz M133
Overview
Manufacturer	Mercedes-AMG
Production	2013–2019
Layout
Configuration	Inline-four engine
Displacement	2.0 L (1,991 cc)
Cylinder bore	83 mm (3.27 in)
Piston stroke	92 mm (3.62 in)
Cylinder block material	Aluminium alloy
Cylinder head material	Aluminium alloy
Valvetrain	DOHC
Compression ratio	8.6:1
Combustion
Turbocharger	Single twin-scroll
Fuel system	Direct injection
Fuel type	Gasoline
Output
Power output	265–280 kW (360–381 PS; 355–375 hp)
Torque output	450–475 N⋅m (332–350 lb⋅ft)
Dimensions
Dry weight	147.8 kg (326 lb)
Chronology
Successor	Mercedes-Benz M139 engine

Design

The M133 is based on the M270 engine but has been extensively revised by AMG.^[2] It features a twin-scroll turbocharger, BlueDIRECT direct injection, iron-carbon alloy on the cylinder walls to reduce friction, and zircon in the cylinder heads to increase thermal conductivity.^[3] The cooling system is also based on the one found in the Mercedes-Benz SLS AMG.^[4] The M133 was updated in 2015, and features performance improvements of 15 kW (20 PS; 20 hp) and 25 N⋅m (18 lb⋅ft).^[5]

Models

Engine	Power	Torque	Years
M133 DE20 LA	265 kW (360 PS; 355 hp) at 6,000 rpm	450 N⋅m (332 lb⋅ft) at 2,250–5,000 rpm	2013–2015
	280 kW (381 PS; 375 hp) at 6,000 rpm	475 N⋅m (350 lb⋅ft) at 2,250–5,000 rpm	2015–2018

M133 DE20 LA (265 kW version)

• 2013–2015 C117 CLA45 AMG^[6]
• 2013–2015 W176 A45 AMG^[7]
• 2014–2015 X156 GLA45 AMG^[8]

M133 DE20 LA (280 kW version)

• 2015–2018 C117 CLA45 AMG^[9]
• 2015–2018 W176 A45 AMG^[10]
• 2015–2019 X156 GLA45 AMG^[11]