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Compare Cadillac CT6 vs BMW 4 Series Gran Coupe G26

Reviews

Neoscore
86%
71%
Pros
  • Multi-link suspension on all four corners
  • Surprisingly good handling for a large sedan
  • Up to 550hp and 868Nm of torque (CT6-V)
  • Down to very low 1.7L/100km fuel consumption (PHEV)
  • Decent performance
  • Good 0.26 drag coefficient
  • Good tech integration
  • Smooth engines
Cons
  • AWD nonsense
  • Hunchback

Variants

2.0T
2.0T (340 Hp) PHEV
2.0T PHEV
3.0T V6 AWD
3.6L V6 AWD
CT6-V Blackwing
420d
420d xDrive
420i
430i
M440i xDrive

Capacity

Cargo Capacity
2.0T433 L / 15.3 cu-ft2.0T (340 Hp) PHEV310 L / 10.9 cu-ft2.0T PHEV300 L / 10.6 cu-ft3.0T V6 AWD433 L / 15.3 cu-ft3.6L V6 AWD433 L / 15.3 cu-ftCT6-V Blackwing447 L / 15.8 cu-ft
470 L / 16.6 cu-ft ~ 1290 L / 45.6 cu-ft
Coolant Capacity
2.0T8.6 L / 9.1 qt2.0T (340 Hp) PHEV8.6 L / 9.1 qt2.0T PHEV9.8 L / 10.4 qt3.0T V6 AWD10.6 L / 11.2 qt3.6L V6 AWD9.8 L / 10.4 qtCT6-V Blackwing10.9 L / 11.5 qt
420d7.0 L / 7.4 qt420d xDrive7.0 L / 7.4 qt420i10.0 L / 10.6 qt430i9.8 L / 10.4 qtM440i xDrive10.5 L / 11.1 qt
Engine Oil Capacity
2.0T4.7 L / 5.0 qt2.0T (340 Hp) PHEV4.7 L / 5.0 qt2.0T PHEV4.7 L / 5.0 qt3.0T V6 AWD5.7 L / 6.0 qt3.6L V6 AWD5.7 L / 6.0 qtCT6-V Blackwing9.5 L / 10.0 qt
420d5.5 L / 5.8 qt420d xDrive5.5 L / 5.8 qt420i5.2 L / 5.5 qt430i5.2 L / 5.5 qtM440i xDrive7.2 L / 7.6 qt
Fuel Capacity
2.0T74.0 L / 19.5 gal2.0T (340 Hp) PHEV59.0 L / 15.6 gal2.0T PHEV59.0 L / 15.6 gal3.0T V6 AWD74.0 L / 19.5 gal3.6L V6 AWD74.0 L / 19.5 galCT6-V Blackwing73.0 L / 19.3 gal
59.0 L / 15.6 gal
Passengers
5
5
Payload
555 kg / 1224 lbs

Chassis

Brakes | Front
Ventilated discs2.0T13.6 in2.0T PHEV14.5 in
Ventilated discs
Brakes | Rear
Ventilated discs2.0T12.4 in2.0T PHEV13.3 in
Ventilated discs
Chassis Type
Unibody
Power Steering
Electric Steering
Electric Steering
Steering Ratio
420d14.8420i14.8430i14.8M440i xDrive13.6
Suspension | Front
Multi-link
MacPherson strut
Suspension | Rear
Multi-link
Multi-link
Tire Size
245/45 R19; 245/40 R202.0T235/50 R18, 245/45 R19, 245/40 R202.0T (340 Hp) PHEVFront wheel tires: 235/50 R18 Rear wheel tires: 265/45 R182.0T PHEV235/50 R183.0T V6 AWD235/50 R18, 245/45 R19, 245/40 R203.6L V6 AWD235/50 R18, 245/45 R19, 245/40 R20CT6-V Blackwing245/40 ZR20
420d225/55 R17 101Y XL420d xDrive225/55 R17 101Y XL420i225/55 R17 101Y XL430i225/55 R17 101Y XLM440i xDrive245/45 R18 100Y XL
Turning Circle
2.0T12.2 m / 40.0 ft2.0T (340 Hp) PHEV12.2 m / 40.0 ft2.0T PHEV12.2 m / 40.0 ft3.0T V6 AWD11.3 m / 37.1 ft3.6L V6 AWD12.2 m / 40.0 ft
12.0 m / 39.4 ft

Construction

Battery | Capacity
0.5 kWh (gross)
Body Style
2.0T4-door Sedan2.0T (340 Hp) PHEV4-door plug-in hybrid Sedan2.0T PHEV4-door plug-in hybrid Sedan3.0T V6 AWD4-door Sedan3.6L V6 AWD4-door SedanCT6-V Blackwing4-door Sedan
Gran Coupe / Sedan420d5-door mild-hybrid Coupe420d xDrive5-door mild-hybrid Coupe420i5-door Coupe430i5-door CoupeM440i xDrive5-door mild-hybrid Coupe

Dimensions

Ground Clearance
140 mm / 5.5 in
Size | Height
2.0T1472 mm / 58.0 in2.0T (340 Hp) PHEV1500 mm / 59.1 in2.0T PHEV1472 mm / 58.0 in3.0T V6 AWD1472 mm / 58.0 in3.6L V6 AWD1472 mm / 58.0 inCT6-V Blackwing1473 mm / 58.0 in
1442 mm / 56.8 in
Size | Length
2.0T5184 mm / 204.1 in2.0T (340 Hp) PHEV5179 mm / 203.9 in2.0T PHEV5184 mm / 204.1 in3.0T V6 AWD5184 mm / 204.1 in3.6L V6 AWD5184 mm / 204.1 inCT6-V Blackwing5227 mm / 205.8 in
4783 mm / 188.3 in
Size | Width
2.0T1879 mm / 74.0 in2.0T (340 Hp) PHEV1879 mm / 74.0 in2.0T PHEV1879 mm / 74.0 in3.0T V6 AWD1879 mm / 74.0 in3.6L V6 AWD1879 mm / 74.0 inCT6-V Blackwing1880 mm / 74.0 in
1852 mm / 72.9 in
Track Width | Front
2.0T1610.0 mm / 63.4 in2.0T (340 Hp) PHEV1617.0 mm / 63.7 in2.0T PHEV1610.0 mm / 63.4 in3.0T V6 AWD1610.0 mm / 63.4 in3.6L V6 AWD1610.0 mm / 63.4 inCT6-V Blackwing1610.0 mm / 63.4 in
420d1595.0 mm / 62.8 in420d xDrive1597.0 mm / 62.9 in420i1595.0 mm / 62.8 in430i1595.0 mm / 62.8 inM440i xDrive1587.0 mm / 62.5 in
Track Width | Rear
2.0T1626.0 mm / 64.0 in2.0T (340 Hp) PHEV1640.0 mm / 64.6 in2.0T PHEV1626.0 mm / 64.0 in3.0T V6 AWD1626.0 mm / 64.0 in3.6L V6 AWD1626.0 mm / 64.0 inCT6-V Blackwing1626.0 mm / 64.0 in
420d1623.0 mm / 63.9 in420d xDrive1624.0 mm / 63.9 in420i1623.0 mm / 63.9 in430i1623.0 mm / 63.9 inM440i xDrive1614.0 mm / 63.5 in
Weight
2.0T1659.0 kg / 3657.5 lbs2.0T (340 Hp) PHEV2000.0 kg / 4409.2 lbs2.0T PHEV2055.0 kg / 4530.5 lbs3.0T V6 AWD1853.0 kg / 4085.2 lbs3.6L V6 AWD1781.0 kg / 3926.4 lbsCT6-V Blackwing2032.0 kg / 4479.8 lbs
420d1705.0 kg / 3758.9 lbs420d xDrive1760.0 kg / 3880.1 lbs420i1620.0 kg / 3571.5 lbs430i1645.0 kg / 3626.6 lbsM440i xDrive1825.0 kg / 4023.4 lbs
Wheel Size
2.0T8J x 18, 8.5J x 19, 8.5J x 202.0T (340 Hp) PHEVFront wheel rims: 18 Rear wheel rims: 182.0T PHEV8J x 183.0T V6 AWD8J x 18, 8.5J x 19J, 8.5J x 203.6L V6 AWD8J x 18, 8.5J x 19, 8.5J x 20CT6-V Blackwing20 in
420d7.5J x 17420d xDrive7.5J x 17420i7.5J x 17430i7.5J x 17M440i xDrive8.5J x 18
Wheelbase
3109 mm / 122.4 in
2856 mm / 112.4 in

Performance

Acceleration | 0 - 100 km/h
420d7.3 sec420d xDrive7.6 sec420i7.9 sec430i6.2 secM440i xDrive4.7 sec
Acceleration | 0 - 60 mph
2.0T5.2 sec2.0T (340 Hp) PHEV5.1 sec2.0T PHEV5.2 secCT6-V Blackwing3.8 sec
420d6.9 sec420d xDrive7.2 sec420i7.5 sec430i5.9 secM440i xDrive4.5 sec
CO2 Emission
420d126 ~ 141 g/km420d xDrive133 ~ 150 g/km420i150 ~ 166 g/km430i156 ~ 173 g/kmM440i xDrive181 ~ 194 g/km
Coefficient Of Drag
0.30
420d0.26420d xDrive0.26420i0.26430i0.26M440i xDrive0.30
Fuel Economy
2.0T9.4 L/100km / 25.0 MPG (combined) | 10.7 L/100km / 22.0 MPG (urban) | 7.8 L/100km / 30.2 MPG (highway)2.0T (340 Hp) PHEV1.7 L/100km / 138.4 MPG (combined)2.0T PHEV9.4 L/100km / 25.0 MPG (combined) | 10.7 L/100km / 22.0 MPG (urban) | 7.8 L/100km / 30.2 MPG (highway)3.0T V6 AWD11.2 L/100km / 21.0 MPG (combined) | 13.1 L/100km / 18.0 MPG (urban) | 9.0 L/100km / 26.1 MPG (highway)3.6L V6 AWD11.2 L/100km / 21.0 MPG (combined) | 13.1 L/100km / 18.0 MPG (urban) | 8.7 L/100km / 27.0 MPG (highway)CT6-V Blackwing16.8 L/100km / 14.0 MPG (urban) | 9.4 L/100km / 25.0 MPG (highway)
420d4.8 L/100km / 49.0 MPG (combined)420d xDrive5.1 L/100km / 46.1 MPG (combined)420i6.6 L/100km / 35.6 MPG (combined)430i6.8 L/100km / 34.6 MPG (combined)M440i xDrive8.0 L/100km / 29.4 MPG (combined)
Top Speed
420d235.0 km/h / 146.0 mph420d xDrive233.0 km/h / 144.8 mph420i235.0 km/h / 146.0 mph430i250.0 km/h / 155.3 mphM440i xDrive250.0 km/h / 155.3 mph
Towing Capacity
420d750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)420d xDrive750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)420i750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)430i750 kg / 1653 lbs (w/o brakes) | 1600 kg / 3527 lbs (w/ brakes @ 12% gradient)M440i xDrive750 kg / 1653 lbs (w/o brakes) | 1800 kg / 3968 lbs (w/ brakes @ 12% gradient)

Powertrain

Drivetrain Layout
2.0TFront-engine (longitudinal), Rear-wheel drive2.0T (340 Hp) PHEVRear-wheel drive2.0T PHEVFront-engine (longitudinal), Rear-wheel drive3.0T V6 AWDFront-engine (longitudinal), All-wheel drive3.6L V6 AWDFront-engine (longitudinal), All-wheel driveCT6-V BlackwingAll-wheel drive
420dFront-engine (longitudinal), Rear-wheel drive420d xDriveFront-engine (longitudinal), All-wheel drive420iFront-engine (longitudinal), Rear-wheel drive430iFront-engine (longitudinal), Rear-wheel driveM440i xDriveFront-engine (longitudinal), All-wheel drive
Emission Standard
Euro 6d
Engine
2.0TLTG2.0T (340 Hp) PHEVLTG2.0T PHEVLTG3.0T V6 AWDLGW3.6L V6 AWDLGXCT6-V BlackwingLTA
420dB47D20B420d xDriveB47D20B420iB48B20A430iB48B20AM440i xDriveB58B30B
Engine | Bore
2.0T86.0 mm / 3.4 in2.0T (340 Hp) PHEV86.0 mm / 3.4 in2.0T PHEV86.0 mm / 3.4 in3.0T V6 AWD86.0 mm / 3.4 in3.6L V6 AWD95.0 mm / 3.7 inCT6-V Blackwing86.0 mm / 3.4 in
420d84.0 mm / 3.3 in420d xDrive84.0 mm / 3.3 in420i82.0 mm / 3.2 in430i82.0 mm / 3.2 inM440i xDrive82.0 mm / 3.2 in
Engine | Compression Ratio
2.0T9.5:12.0T (340 Hp) PHEV9.5:12.0T PHEV9.5:13.0T V6 AWD9.8:13.6L V6 AWD11.5:1CT6-V Blackwing9.8:1
420d16.5:1420d xDrive16.5:1420i11.0:1430i10.2:1M440i xDrive10.2:1
Engine | Displacement
2.0T2.0 L / 121.9 cu-in / 1998.0 cc2.0T (340 Hp) PHEV2.0 L / 121.9 cu-in / 1998.0 cc2.0T PHEV2.0 L / 121.9 cu-in / 1998.0 cc3.0T V6 AWD3.0 L / 182.5 cu-in / 2990.0 cc3.6L V6 AWD3.6 L / 222.7 cu-in / 3649.0 ccCT6-V Blackwing4.2 L / 255.8 cu-in / 4192.0 cc
420d2.0 L / 121.7 cu-in / 1995.0 cc420d xDrive2.0 L / 121.7 cu-in / 1995.0 cc420i2.0 L / 121.9 cu-in / 1998.0 cc430i2.0 L / 121.9 cu-in / 1998.0 ccM440i xDrive3.0 L / 182.9 cu-in / 2998.0 cc
Engine | Power
2.0T269.0 hp / 200.6 kW @ 5500 rpm2.0T (340 Hp) PHEV276.0 hp / 205.8 kW @ 5300 rpm + 116.0 hp / 86.5 kW (electric motor)2.0T PHEV265.0 hp / 197.6 kW + 100.0 hp / 74.6 kW (electric motor)3.0T V6 AWD409.0 hp / 305.0 kW @ 5700 rpm3.6L V6 AWD340.0 hp / 253.5 kW @ 6800 rpmCT6-V Blackwing550.0 hp / 410.1 kW @ 5000 rpm
420d190.0 hp / 141.7 kW @ 4000 rpm + 11.0 hp / 8.2 kW (electric motor)420d xDrive190.0 hp / 141.7 kW @ 4000 rpm + 11.0 hp / 8.2 kW (electric motor)420i184.0 hp / 137.2 kW @ 5000-6500 rpm430i245.0 hp / 182.7 kW @ 4500-6500 rpmM440i xDrive374.0 hp / 278.9 kW @ 5500-6500 rpm + 11.0 hp / 8.2 kW (electric motor)
Engine | Redline
2.0T7000 rpm2.0T (340 Hp) PHEV7000 rpm2.0T PHEV7000 rpm3.0T V6 AWD6500 rpm3.6L V6 AWD7200 rpm
Engine | Specific Output
2.0T134.6 hp/L / 2.2 hp/cu-in2.0T (340 Hp) PHEV138.1 hp/L / 2.3 hp/cu-in2.0T PHEV132.6 hp/L / 2.2 hp/cu-in3.0T V6 AWD136.8 hp/L / 2.2 hp/cu-in3.6L V6 AWD93.2 hp/L / 1.5 hp/cu-inCT6-V Blackwing131.2 hp/L / 2.2 hp/cu-in
420d95.2 hp/L / 1.6 hp/cu-in420d xDrive95.2 hp/L / 1.6 hp/cu-in420i92.1 hp/L / 1.5 hp/cu-in430i122.6 hp/L / 2.0 hp/cu-inM440i xDrive124.7 hp/L / 2.0 hp/cu-in
Engine | Stroke
2.0T86.0 mm / 3.4 in2.0T (340 Hp) PHEV86.0 mm / 3.4 in2.0T PHEV86.0 mm / 3.4 in3.0T V6 AWD85.6 mm / 3.4 in3.6L V6 AWD85.8 mm / 3.4 inCT6-V Blackwing90.2 mm / 3.6 in
420d90.0 mm / 3.5 in420d xDrive90.0 mm / 3.5 in420i94.6 mm / 3.7 in430i94.6 mm / 3.7 inM440i xDrive94.6 mm / 3.7 in
Engine | Torque
2.0T400 Nm / 295.0 lb-ft @ 3000-4500 rpm2.0T (340 Hp) PHEV400 Nm / 295.0 lb-ft @ 3000-4300 rpm + 270 Nm / 199.1 lb-ft2.0T PHEV400 Nm / 295.0 lb-ft3.0T V6 AWD542 Nm / 399.8 lb-ft @ 2500-5100 rpm3.6L V6 AWD385 Nm / 284.0 lb-ft @ 5300 rpmCT6-V Blackwing868 Nm / 640.2 lb-ft @ 3400 rpm
420d400 Nm / 295.0 lb-ft @ 1750-2500 rpm420d xDrive400 Nm / 295.0 lb-ft @ 1750-2500 rpm420i300 Nm / 221.3 lb-ft @ 1350-4000 rpm430i400 Nm / 295.0 lb-ft @ 1600-4000 rpmM440i xDrive500 Nm / 368.8 lb-ft @ 1900-5000 rpm
Engine | Type
2.0TTurbocharged direct-injected petrol inline-4 DOHC engine with 4 values per cylinder2.0T (340 Hp) PHEVTurbocharged direct-injected petrol inline-4 engine2.0T PHEVTurbocharged direct-injected petrol inline-4 DOHC engine with 4 values per cylinder3.0T V6 AWDBi-turbocharged direct-injected petrol V6 DOHC engine with 4 values per cylinder3.6L V6 AWDNaturally-aspirated direct-injected petrol V6 DOHC engine with 4 values per cylinderCT6-V BlackwingBi-turbocharged direct-injected petrol V8 DOHC engine with 4 values per cylinder
420dTwin-scroll turbocharged commonrail diesel inline-4 engine with 4 values per cylinder420d xDriveTwin-scroll turbocharged commonrail diesel inline-4 engine with 4 values per cylinder420iTwin-scroll turbocharged direct-injected petrol inline-4 engine with 4 values per cylinder430iTwin-scroll turbocharged direct-injected petrol inline-4 engine with 4 values per cylinderM440i xDriveTwin-scroll turbocharged direct-injected petrol inline-6 engine with 4 values per cylinder
Fuel Capacity
73.8 L
Transmission | Gears
10-speed2.0T8-speed2.0T (340 Hp) PHEV8-speed2.0T PHEV8-speed3.0T V6 AWD8-speed3.6L V6 AWD8-speedCT6-V Blackwing10-speed
8-speed
Transmission | Type
Automatic2.0TAutomatic Hydra-Matic2.0T (340 Hp) PHEVe-CVT2.0T PHEVe-CVT3.0T V6 AWDAutomatic Hydra-Matic3.6L V6 AWDAutomatic Hydra-MaticCT6-V BlackwingAutomatic
Automatic Steptronic

Production

Availability
2.0T2016 ~ 20202.0T (340 Hp) PHEV2016 ~ 20202.0T PHEV2017 ~ 20183.0T V6 AWD2016 ~ 20203.6L V6 AWD2016 ~ 2020CT6-V Blackwing2018 ~ 2020
2021
Debut
2015 New York Auto Show
2021-06-09
Made In
US: Michigan; China: Shanghai
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