BMW B48
Overview
ManufacturerBMW
Production2014–present
Layout
ConfigurationInline-four
Displacement1,597 cc (97 cu in)
1,998 cc (122 cu in)
Cylinder bore82.0 mm (3.23 in)
Piston stroke75.6 mm (2.98 in)
94.6 mm (3.72 in)
ValvetrainDOHC
Valvetrain drive systemChain
Compression ratio8.9:1
11:1
Combustion
TurbochargerSingle twin-scroll
Fuel systemDirect injection
Fuel typePetrol
Chronology
PredecessorBMW N20
B48 in a 2019 BMW 125i, dual circulation cooling system with water-cooled intercooler
B48 in a 2014 MINI Cooper S

The BMW B48 is a turbocharged inline-four petrol engine which replaced the BMW N20 and has been in production since 2014. It was first used in the F56 Mini Hatch and has been used in BMW applications since 2015.

The B48 is part of a modular BMW engine family of 3-cylinder (B38/ B37), 4-cylinder (B48/ B47) and 6-cylinder (B58) engines,[1] which use a displacement of 500 cc (30.5 cu in) per cylinder.

Design

Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction".[2] As per the N20, the block and head are made from aluminium.[3] Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS).[4]

Models

Engine Power Torque Years
B48B16 1,597 cc (97 cu in) 125 kW (168 hp)
at 5,000–6,000 rpm		 250 N⋅m (184 lb⋅ft)
at 2,000–4,700 rpm		 2017–
B48B20 1,998 cc (122 cu in) 115 kW (154 hp)
at 4,500–6,500 rpm		 250 N⋅m (184 lb⋅ft)
at 1,300–4,300 rpm		 2020–
B48A20U1 131 kW (176 hp)

at 5,000–5,500 rpm

280 N⋅m (207 lb⋅ft)

at 1,350–4,200 rpm

B48B20M0 135 kW (181 hp)
at 5,000–6,500 rpm		 270 N⋅m (199 lb⋅ft)
at 1,350–4,600 rpm		 2016–
135 kW (181 hp)
at 5,000–6,500 rpm 		290 N⋅m (214 lb⋅ft)
at 1,350–4,250 rpm
B48A20M1 141 kW (189 hp)
at 5,000–6,500 rpm 		280 N⋅m (207 lb⋅ft)
at 1,250–4,600 rpm 		2014–
141 kW (189 hp)
at 4,700–6,000 rpm 		280 N⋅m (207 lb⋅ft)
at 1,250–4,750 rpm
141 kW (189 hp)
at 5,000–6,000 rpm 		280 N⋅m (207 lb⋅ft)
at 1,350–4,600 rpm
195 kW (261 hp)
at 5,000–6,000 rpm 		400 N⋅m (295 lb⋅ft)
at 1,350–4,600 rpm
B48B20M1 145 kW (194 hp)
at 4,500–6,600 rpm		 320 N⋅m (236 lb⋅ft)
at 1,450–4,200 rpm		 2019–
B48B20O1 165 kW (221 hp)
at 5,000–6,500 rpm		 310 N⋅m (229 lb⋅ft)
at 1,400–5,000 rpm		 2016–
B48A20O1 170 kW (228 hp)
at 5,000–6,000 rpm		 350 N⋅m (258 lb⋅ft)
at 1,250–4,500 rpm		 2015–
170 kW (228 hp)
at 5,200–6,200 rpm 		300 N⋅m (221 lb⋅ft)
at 1,250–4,800 rpm
170 kW (228 hp)
at 5,000–6,000 rpm 		350 N⋅m (258 lb⋅ft)
at 1,450–4,500 rpm
B48O1ZIK 180 kW (241 hp)
at 4,500–6,500 rpm 		400 N⋅m (295 lb⋅ft)
at 1,600–4,000 rpm
B48B20O0 185 kW (248 hp)
at 5,200–6,500 rpm		 350 N⋅m (258 lb⋅ft)
at 1,450–4,800 rpm 		2015–
B48B20O1 190 kW (255 hp)
at 5,000–6,500 rpm		 400 N⋅m (295 lb⋅ft)
at 1,550–4,400 rpm		 2016–
B48A20T1 225 kW (302 hp)
at 5,000–6,250 rpm		 450 N⋅m (332 lb⋅ft)
at 1,750–4,500 rpm		 2019–

115 kW version

125 kW version

131 kW version

135 kW version

When combined with the electric motor, the 330e and 530e overall output is 185 kW (248 hp) and 420 N⋅m (310 lb⋅ft)[5] [6]

141 kW version

145 kW version

In the MINI Cooper S, a temporary overboost increases peak torque from 20 N⋅m (15 lb⋅ft) to 300 N⋅m (221 lb⋅ft).[7]

165 kW version

170 kW version

180 kW version

185 kW version

190 kW version

195 kW version

225 kW version

Introduced in May 2019 this engine features a reinforced crankshaft with larger main bearings and new pistons with a lower 9.5:1 compression ratio, this allows the engine to take more boost pressure from a larger turbocharger, which blows compressed air through a reworked intake tract.[12] [13]

References

  1. ^ "BMW modular engines: B37, B38, B47 and B48". www.bmwblog.com. 21 May 2014. Archived from the original on 6 October 2021. Retrieved 10 May 2017.
  2. ^ "Watch out for the B's – Comparing the upcoming B48 2.0 liter turbo four-cylinder to the N20 it will replace". www.bimmerboost.com. Archived from the original on 15 June 2017. Retrieved 10 May 2017.
  3. ^ "2016 BMW X1 first drive review". www.caranddriver.com. 16 July 2015. Archived from the original on 9 May 2017. Retrieved 10 May 2017.
  4. ^ "BMW B48 Four Cylinder Turbocharged Engines".
  5. ^ "Build Your Own Car: Luxury Car Customizer by BMW USA". Archived from the original on 2017-04-29. Retrieved 2017-03-27.
  6. ^ "Build Your Own Car: Luxury Car Customizer by BMW USA". Archived from the original on 2021-10-06. Retrieved 2019-04-13.
  7. ^ "BMW's new B48 2.0 litre four-cylinder TwinPower Turbo engine to produce up to 255 hp and 400 Nm". www.paultan.org. 24 February 2014. Archived from the original on 14 August 2017. Retrieved 16 May 2017.
  8. ^ "MINI's Prince Engine is Dead- enter the B37 & B48". www.motoringfile.com. 5 September 2013. Archived from the original on 14 January 2016. Retrieved 16 May 2017.
  9. ^ "Future Mini JCW models to get new 230bhp petrol engine". Archived from the original on 2014-07-06. Retrieved 2014-07-03.
  10. ^ "The new 2017 BMW 2 Series now featuring the latest generation of BMW TwinPower Turbo engines". Press.bmwgroup.com. 2017-05-17. Archived from the original on 2017-09-13. Retrieved 2017-09-01.
  11. ^ "2017 BMW 740e xDrive Plug-In Hybrid". www.caranddriver.com. 22 July 2016. Archived from the original on 31 July 2017. Retrieved 31 July 2017.
  12. ^ Nishimoto, Alex (7 September 2018). "2019 BMW X2 M35i Debuts With 302-HP Turbo-Four". Motor Trend. Archived from the original on 1 October 2020. Retrieved 9 April 2020.Bode, Matthias; Lampka, Andreas (15 May 2019). "The new MINI John Cooper Works Clubman and the new MINI John Cooper Works Countryman". BMW Group. Archived from the original on 6 October 2021. Retrieved 9 April 2020.
  13. ^ Bode, Matthias; Lampka, Andreas (20 November 2019). "The new MINI John Cooper Works GP". BMW Group. Archived from the original on 23 March 2020. Retrieved 9 April 2020.
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