vs
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
Top 95%71 points
Top 95%
Top 95%75 points
Top 95%
Top specs, facts and figures

BMW Z4 Roadster sDrive20i (2014) vs Porsche 918 Spyder (2015): 35 facts in comparison

1. Has dual-clutch transmission

A dual-clutch transmission (DCT) is an automated manual transmission that allows the driver to control gear-shifts themselves or to let the computer decide. Upshifts are extremely fast, resulting in smooth acceleration, and due to the uninterrupted power flow it also has the benefit of increasing fuel efficiency.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
25% have it

2. faster top speed

The fastest speed that the car can reach.
235km/h
Hennessey Venom GT (2014): 447km/h
344km/h

3. weight

230.97kg lighter.
1.47t
Nissan Note Advance CVT (2015): 1.5kg
1.7t

4. more cylinders

Although there are many aspects that determine the power, a higher number of cylinders is generally a good indication of the potential power of the engine.
4
Bugatti Veyron 16.4 Grand Sport (2013): 16
8

5. faster acceleration (0-100)

The time it takes for the car to accelerate from 0-100 kilometres per hour.
6.9s
Tesla Roadster: 1.9s
2.5s

6. Has Bluetooth

Bluetooth is a wireless technology that allows you to easily transfer data between different devices, such as smartphones, tablets and computers.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
89% have it

7. Has a turbocharged engine

A turbocharger compresses the air entering the cylinders, allowing more air (and therefore more fuel) to be added - resulting in a more powerful explosion. This leads to an increase in horsepower without increasing the size and weight of the engine.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
58% have it

8. higher maximum torque

Torque is a measurement of an engine’s power, closely related to horsepower. More torque indicates a more powerful car, and is also a good indication of its acceleration.
270Nm
Bugatti Veyron 16.4 Grand Sport (2013): 1250Nm
540Nm

9. less CO2 emissions

The CO2 emissions of the car, measured in grams per kilometre. A car with less emissions is better for the environment.
159g/km
Porsche 918 Spyder (2015): 72g/km
72g/km

10. better fuel economy (combined)

Fuel economy is a measurement of fuel efficiency, based on how far you can travel with a certain amount of petrol (gasoline). A lower fuel economy means the car will be cheaper to run.
6.8l/100 km
Porsche 918 Spyder (2015): 3.1l/100 km
3.1l/100 km

11. Has rear-wheel drive

Rear-wheel drive benefits from increased traction when accelerating, as the weight of the vehicle shifts to the rear over the drive wheels. The weight of the car is also more evenly distributed, resulting in improved handling.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
67% have it

12. Has a petrol (gasoline) engine

A petrol (gasoline) engine offers several advantages over diesel. For example the engines tend to be lighter and cheaper than their diesel counterparts. Petrol engines also tend to have higher horsepower, and the fuel is more readily available.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
89% have it

13. shorter length

407mm shorter length.
4.24m
Renault Twizy EV 13kW (2014): 2.34m
4.65m

14. longer wheelbase

The wheelbase is the distance between the center of the front and rear wheels. A longer wheelbase provides the car with more stability and a smoother ride (although a shorter wheelbase can provide more responsive handling).
2.5m
Toyota Tundra SR5 (2014): 3.7m
2.73m

15. height

123mm shorter.
1.29m
Volvo XC70 (2015): 917mm
1.17m

16. width

287mm narrower.
1.95m
Peugeot 208 Allure (2014): 1m
1.66m

17. larger engine size

This measurement is the total volume of all the engine's cylinders, also known as the engine displacement. This is one of many aspects of an engine that determine its horsepower, but generally speaking a greater size indicates more power.
3l
SRT Viper (2014): 8.4l
4.6l

18. larger fuel tank

A larger fuel tank means that you have to stop to refill less often.
55l
Ford Super Duty F-250 XL (2015): 132l
70l

19. lower coefficient of drag

The coefficient of drag is one measurement of how well air travels around a vehicle. A lower value means it is more aerodynamic and the engine doesn't have to work as hard. It can result in faster speeds and lower fuel economy.
0.35Cd
Tesla Model X 75D (2016): 0.24Cd
0.36Cd

20. smaller turn radius

The turn radius indicates the smallest circular turn a car can make. With a smaller turn radius it is easier to perform a U-turn in one attempt instead of having to reverse back and forth in order to turn around.
10.7m
Scion iQ2 (2014): 4.2m
12.7m

21. Has fully independent suspension

This allows all four wheels to move up and down independently, providing a smoother ride when, for example, going over bumps in the road.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
72% have it

22. longer basic warranty (years)

The basic warranty of a car covers all aspects other than parts which are subject to normal wear and tear, such as windscreen wipers and brake pads. It lasts either a certain number of years or amount of kilometres driven.
4yrs
Nissan Versa Note S (2014): Unlimited yrs
4yrs

23. longer drivetrain warranty (years)

The drivetrain warranty covers parts of the car such as the engine, transmission, driveshaft etc. This is usually longer than the basic warranty. It lasts either a certain number of years or amount of kilometres driven.
4yrs
Kia Rondo Platinum (2014): 12yrs
4yrs

24. Has smart key as standard

A smart key is a wireless key that offers several benefits over a traditional key. For example when you approach the car the doors will automatically unlock, and you can turn the engine on with the press of a button.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
52% have it

25. Has in-car system

An in-car system (eg. Ford SYNC, Apple CarPlay) gives you extra functionality, such as navigation, taking phone calls (when linked to your smartphone) and controlling music.
BMW Z4 Roadster sDrive20i (2014)
Porsche 918 Spyder (2015)
49% have it

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