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2006. - 2009. Production 2007. - 2009.
S - Sports car Vehicle class S - Sports car
cabriolet, 2 door Body style cabriolet, 2 door
Rear Wheel drive Rear
Dimensons & Volumes
4091 mm
Length 4100 mm
1781 mm
Width 1813 mm
1299 mm
Height 1274 mm
240 liters
Boot (min) 66 liters
260 liters
Boot (max) 157 liters
55 liters
Fuel tank 52 liters
Opel / General Motors
2.0 Z20NHH
Petrol Fuel Petrol
6 - Inline, 4 valves per cylinder Configuration 4 - Inline, 4 valves per cylinder
Naturally Aspir. Aspiration Turbo
2497 cc
Displacement 1998 cc
218 hp
Power 264 hp
250 Nm
Torque 353 Nm
Performance (manual gearbox)
manual gearbox - 6 gears
manual gearbox - 5 gears
1260 kg
Vehicle weight 1306 kg
6.5 s
Acc. 0-100 5.7 s
240 km/h
Top speed 229 km/h
12.0 l/100km
Cons. (urban) 13.0 l/100km
6.3 l/100km
Cons. (highway) 6.9 l/100km
8.4 l/100km
Cons. (average) 9.2 l/100km
202 g/km
CO2 emissions 218 g/km
Performance (automatic gearbox)
automatic - 6 gears
1295 kg
Vehicle weight kg
6.9 s
Acc. 0-100 s
238 km/h
Top speed km/h
12.8 l/100km
Cons. (urban) l/100km
6.8 l/100km
Cons. (highway) l/100km
9.0 l/100km
Cons. (average) l/100km
216 g/km
CO2 emissions g/km
13500 EUR
Price from 12850 EUR
Virtual Adviser's™ opinion


Well, these are two pretty similar cars we have here! It's only details that could potentially make the difference. Considering they both belong to the sports car segment and utilize the same 2-door cabriolet body style and the rear wheel drive system, it all comes up to the specific petrol engine choice they offer. The first one has a BMW-engineered powertrain under the hood, a 6-cylinder, 24-valves 218hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 264hp engine designed by Opel.


The fact that the BMW got tested by the European New Car Assessment Programme (Euro NCAP), while the other contender didn't, offers a slight advantage, as the 4-star rating is better than none. Moving further on, let's take a closer look at some additional safety-related facts. Both vehicles belong to the sports car segment, which is generally classifying them somewhere in the middle safety-wise, still it doesn't help us solve our dilemma, does it? On the other hand, taking kerb weight as an important factor into account, Opel GT offers a marginal difference of 4% more metal.


I don't like generalizing things when it comes to reliability, although it does seem that Opel does have a slight advantage, all the models observed together. These are the results of an independent reasearch, while our visitors describe reliability of BMW with an average rating of 4.3, and models under the Opel badge with 4.2 out of 5. Unfortunatelly, I don't have enough insight that would allow me to comment in more details on the specific models level. That apart, owners of different cars powered by the same engine as BMW Z4 rank it on average as 4.0, while the one under the competitor's bonnet gets 3.0 out of 5.

Performance & Fuel economy

Opel is a bit more agile, reaching 100km/h in 0.8 seconds less than its competitor. Still, it lacks the power to win the top speed competition, topping at 229 kilometers per hour, 11km/h less than the other car. When it comes to fuel economy the winner has to be BMW Z4, averaging around 8.4 liters of fuel per 100 kilometers (34 mpg), in combined cycle. We can't ignore that 10% difference compared to Opel GT.


BMW appears just a bit more reliable, although the difference is truly marginal. The most important thing when deciding between any two vehicles should always be safety, both passive and active. In my opinion, everything taken into account, BMW Z4 offers much better overall protection, which launches it ahead of the other contender. From there things take a different direction, with Opel offering somewhat better performance, just enough to call it quicker. It does come at a cost though, and that's the fuel consumption... All together, there's not much more to say, in this case I wouldn't even consider anything but BMW. Anyway, that's the most objective conclusion I could've came up with and it's based solely on the information found on this website. Aspects such as design, practicality, brand value and driving experience are there for you to measure them out. In case you have two minutes to spare I invite you to define your needs, desires and budget and see which car would be chosen by the virtual adviser™, among thousands of similar, yet so different vehicles.
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