The M270 and M274 are turbocharged inline-four engines produced by Mercedes-Benz since 2011. They are the successor to the previous M266 and M271 engines respectively. The engine appeared on the Ward's 10 Best Engines list for 2017.

Design

M270 refers to the transverse configuration for front-wheel drive vehicles, while M274 refers to the longitudinally-mounted layout for rear-wheel drive vehicles. Both engines are based on the same design with dual overhead camshafts, 4 valves per cylinder, variable valve timing, direct injection, and compliance with the EU6 emissions standard. A 2.0 litres (1,991 cc) engine was introduced in September 2012 featuring an increased piston stroke up to 92 mm (3.62 in), increased performance figures, and a 9.8:1 compression ratio. The M274 engine was also used on the Infiniti Q50 since 2014.

M270 engine

EngineDisplacementPowerTorqueYears
M270 DE16 LA R1.6 L; 97.3 cu in (1,595 cc)75 kW (101 hp; 102 PS) at 4,500–6,000 rpm180 N⋅m (133 lb⋅ft) at 1,200–3,500 rpm2015–
90 kW (121 hp; 122 PS) at 5,000 rpm200 N⋅m (148 lb⋅ft) at 1,250–4,000 rpm2011–
M270 DE16 LA115 kW (154 hp; 156 PS) at 5,000 rpm250 N⋅m (184 lb⋅ft) at 1,250–4,000 rpm
M270 DE20 LA2.0 L; 121.5 cu in (1,991 cc)115 kW (154 hp; 156 PS) at 5,000 rpm270 N⋅m (199 lb⋅ft) at 1,250–4,000 rpm2013–
135 kW (181 hp; 184 PS) at 5,000 rpm300 N⋅m (221 lb⋅ft) at 1,250–4,000 rpm
155 kW (208 hp; 211 PS) at 5,500 rpm350 N⋅m (258 lb⋅ft) at 1,200–4,000 rpm2012–
160 kW (215 hp; 218 PS) at 5,500 rpm350 N⋅m (258 lb⋅ft) at 1,200–4,000 rpm2015–

M270 DE16 LA R

75 kW version

  • 2015–2018 A 160 (W176)
  • 2015–2018 B 160 (W246)

90 kW version

M270 DE16 LA

M270 DE20 LA

115 kW version

  • 2013–2018 B 200 Natural Gas Drive (W246)

135 kW version

155 kW version

160 kW version

M274 engine

EngineDisplacementPowerTorqueYears
M274 DE16 LA D274.9101.6 L; 97.3 cu in (1,595 cc)95 kW (127 hp; 129 PS) at 5,000 rpm210 N⋅m (155 lb⋅ft) at 1,200–4,000 rpm2015–
115 kW (154 hp; 156 PS) at 5,300 rpm250 N⋅m (184 lb⋅ft) at 1,250–4,000 rpm2012–
M274 DE20 LA D274.9202.0 L; 121.5 cu in (1,991 cc)115 kW (154 hp; 156 PS) at 5,000 rpm270 N⋅m (199 lb⋅ft) at 1,250–4,000 rpm2013–
135 kW (181 hp; 184 PS) at 5,500 rpm300 N⋅m (221 lb⋅ft) at 1,200–4,000 rpm
155 kW (208 hp; 211 PS) at 5,500 rpm350 N⋅m (258 lb⋅ft) at 1,200–4,000 rpm
180 kW (241 hp; 245 PS) at 5,500 rpm370 N⋅m (273 lb⋅ft) at 1,300–4,000 rpm2015–
189 kW (253 hp; 257 PS) at 5,800 – 6,100 rpm2019–

M274 DE16 LA

95 kW version

115 kW version

M274 DE20 LA

115 kW version

135 kW version

155 kW version

180 kW version