Car comparison

SAIC Z7 81 kWhvsPolestar 2 78 kWh

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

81 kWh

SAIC Z7

81 kWh

359 hpElectricRWDAutomaticLiftback / fastback2026-present

VS

78 kWh

Polestar 2

78 kWh

408 hpElectricAWDAutomaticLiftback / fastback2020-2023

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Polestar 2 78 kWh

Quickest 0-100 km/h
4.7 s
Most powerful
408 hp
304 kW
Highest torque
660 Nm
487 lb-ft
Lightest
2,113 kg
4,658 lb
Best power-to-weight
193 hp/t
144 kW/t
5.2 kg/hp
Best overall score
76/100
Best performance score
72/100
Best practicality score
83/100

SAIC Z7 81 kWh

Fastest top speed
230 km/h
143 mph Unrestricted
220 km/h
137 mph Restricted
Largest trunk
476 L
Best economy score
0/100

Specification comparison

Specification comparison
Model	SAICZ781 kWh	Polestar278 kWh
Power	359hp268kW	408hp304kW
Torque	460Nm339lb-ft	660Nm487lb-ft
Curb weight	2,260kg4,982lb	2,113kg4,658lb
Gross weight	2,700kg5,952lb	2,600kg5,732lb
Top speed	Unrestricted 230 km/h143 mph Restricted 220 km/h137 mph Calculated	205 km/h 127 mph
To 99% top speed	78.0s99% target: 228 km/h / 141 mph Calculated	52.4s99% target: 203 km/h / 126 mph Calculated
0-100 km/h	5.5s	4.7s
0-200 km/h	27.6s Calculated	40.0s Calculated
0-60 mph	5.2s Calculated	4.4s Calculated
Quarter mile	13.8s Calculated	13.2s Calculated
Power-to-weight	159hp/t118kW/t72hp/1000 lb Calculated	193hp/t144kW/t88hp/1000 lb Calculated
Torque-to-weight	204Nm/t136lb-ft/ton Calculated	312Nm/t209lb-ft/ton Calculated
Length	5,036mm198in	4,606mm181in
Width	1,976mm78in	1,800mm71in
Height	1,465mm58in	1,479mm58in
Wheelbase	3,000mm118in	2,735mm108in
Front track	1,715mm68in	1,602mm63in
Rear track	1,722mm68in	1,601mm63in
Ground clearance	-	151mm6in
Trunk volume	476L	-
Max trunk volume	1,499L	440L
Doors	5	5
Seats	5	5

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
Metric	SAICZ781 kWh	Polestar278 kWh
	Acceleration checkpoints
0-60 mph 0-97 km/h	5.2 s	4.4 s
0-100 km/h 0-62 mph	5.5 s	4.7 s
0-200 km/h 0-124 mph	27.6 s	40.0 s
Top speed	Unrestricted 230 km/h143 mph Restricted 220 km/h137 mph Likely limited	205 km/h 127 mph
	Drag race simulation
60 ft 18 m	2.1 s	1.9 s
330 ft 101 m	5.8 s	5.4 s
1/8 mile 201 m	8.8 s	8.4 s
1000 ft 305 m	11.5 s	11.0 s
1/4 mile 402 m	13.8 s	13.2 s
Trap speed 1/4 mile 402 m	159 km/h 99 mph	161 km/h 100 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
Vehicle	Value
SAICZ781 kWh	359 hp 268 kW
Polestar278 kWh	408 hp 304 kW

Polestar 2 78 kWh has 49 hp more than SAIC Z7 81 kWh.

The biggest power difference is between SAIC Z7 81 kWh and Polestar 2 78 kWh: 49 hp (37 kW).

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
Vehicle	Value
SAICZ781 kWh	460 Nm 339 lb-ft
Polestar278 kWh	660 Nm 487 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
Vehicle	Value
SAICZ781 kWh	2,260 kg 4,982 lb
Polestar278 kWh	2,113 kg 4,658 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
Vehicle	Value
SAICZ781 kWh	Unrestricted 230 km/h143 mph Restricted 220 km/h137 mph
Polestar278 kWh	205 km/h 127 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
Vehicle	Value
SAICZ781 kWh	5.5 s
Polestar278 kWh	4.7 s

The biggest 0-100 km/h difference is between Polestar 2 78 kWh and SAIC Z7 81 kWh: 0.8 s.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
Vehicle	Value
SAICZ781 kWh	159 hp/t 118 kW/t 6.3 kg/hp
Polestar278 kWh	193 hp/t 144 kW/t 5.2 kg/hp

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
Vehicle	Power	Acceleration	Top speed
SAICZ781 kWh	359 hp 268 kW	5.5 s	Unrestricted 230 km/h143 mph Restricted 220 km/h137 mph
Polestar278 kWh	408 hp 304 kW	4.7 s	205 km/h 127 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Vehicle

Performance score

Practicality score

Power	359 hp 268 kW
0-100 km/h	5.5 s
Top speed Unrestricted 230 km/h143 mph Restricted 220 km/h137 mph

Doors/seats	5 doors 5 seats
Trunk	476 L 16.8 cu ft
Length	5,036 mm 198.3 in
Height	1,465 mm 57.7 in

Polestar278 kWh

Power	408 hp 304 kW
0-100 km/h	4.7 s
Top speed 205 km/h 127 mph

Doors/seats	5 doors 5 seats
Trunk	440 L 15.5 cu ft
Length	4,606 mm 181.3 in
Height	1,479 mm 58.2 in

Detailed score breakdown

Vehicle

Polestar278 kWh

Power

359 hp

268 kW

408 hp

304 kW

Torque

460 Nm

339 lb-ft

660 Nm

487 lb-ft

Acceleration

5.5 s

4.7 s

Top speed

Unrestricted

230 km/h143 mph

Restricted

220 km/h137 mph

205 km/h

127 mph

Lightness

2,260 kg

4,982 lb

2,113 kg

4,658 lb

Practicality

Doors/seats	5 doors 5 seats
Trunk	476 L 16.8 cu ft
Length	5,036 mm 198.3 in
Height	1,465 mm 57.7 in

Doors/seats	5 doors 5 seats
Trunk	440 L 15.5 cu ft
Length	4,606 mm 181.3 in
Height	1,479 mm 58.2 in

Trunk score

476 L

16.8 cu ft

440 L

15.5 cu ft

Power-to-weight score

159 hp/t

118 kW/t

6.3 kg/hp

193 hp/t

144 kW/t

5.2 kg/hp

Overall

Fixed score

Fixed score

Head-to-head comparisons

SAIC Z7 81 kWh

Has 25 km/h (16 mph) higher top speed
Has 36 L more trunk volume

Pros

Highest top speed
Largest trunk

Cons

Slowest 0-100 km/h
Lowest power
Heaviest

Polestar 2 78 kWh

Has 49 hp more
Has 200 Nm more
Is 147 kg lighter
Is 0.8 s quicker from 0-100 km/h
Has 34 hp/t better power-to-weight

Pros

Quickest 0-100 km/h in this comparison
Most powerful
Highest torque
Lightest
Best power-to-weight ratio

Cons

Lowest top speed
Smallest trunk

Choose cars to compare

Brand

Model

Generation

Engine or modification

SAIC Z7 81 kWh

Polestar 2 78 kWh

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SAIC Z7 81 kWh vs Polestar 2 78 kWh - car comparison - FastVsFaster