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Car #1
Car #2

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2005. - 2010.
S - Sports car
cabriolet, 2 door
Vehicle class
Body style
Wheel drive
2007. - 2009.
S - Sports car
cabriolet, 2 door


Dimensons & Outlines

4393 mm
1830 mm
1318 mm
235 liters
235 liters
70 liters
Boot (min)
Boot (max)
Fuel tank
4100 mm
1813 mm
1274 mm
66 liters
157 liters
52 liters
2005 Alfa Romeo Brera Spider
2007 Opel GT


Alfa Romeo / General Motors
3.2 Busso V6 JTS
6 - V config, 4 valves per cylinder
Nat. Asp.
3179 cc
260 hp
322 Nm
Opel / General Motors
2.0 Z20NHH
4 - Inline, 4 valves per cylinder
1998 cc
264 hp
353 Nm

Performance (manual gearbox)

manual gearbox - 6 gears
1665 kg
7.0 s
240 km/h
16.9 l/100km
8.4 l/100km
11.5 l/100km
273 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
manual gearbox - 5 gears
1306 kg
5.7 s
229 km/h
13.0 l/100km
6.9 l/100km
9.2 l/100km
218 g/km

Performance (automatic gearbox)

automatic - 6 gears
1685 kg
7.2 s
240 km/h
18.4 l/100km
8.6 l/100km
12.2 l/100km
273 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions


3500 EUR
Price from
14500 EUR

Virtual Adviser's™ opinion


Two significantly similar cars, no doubt about that. Still, each one has something different to offer. Having both cars powered by petrol engines and utilizing the 2-door cabriolet body style within the same 'Sports car' segment, the only major difference here really is their wheel drive configuration (front for the Alfa Romeo and rear in the case of the Opel). The first one has a Alfa Romeo-engineered powertrain under the hood, a 6-cylinder, 24-valves 260hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 264hp engine designed by Opel.


Unfortunatelly, neither of the two vehicles was submitted to the European New Car Assessment Programme (Euro NCAP) testing. This makes it virtually impossible for me to pick one over the other and I'm generally against buying such cars as the safety should really always come first. That aside, let's consider some other aspects which affect safety. 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? Furthermore, taking kerb weight as an important factor into account, the Italian car offers a considerable difference of 27% more metal.


Reliability is not the best thing to consider on the make level, but it is worth mentioning that Opel as a brand displays somewhat better results, all the models observed together. These are the official statistics, while our visitors describe reliability of Alfa Romeo, as well as Opel, with the same average rating of 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. We should definitely mention that owners of cars with the same powertrain as the Italian car rank it on average as 5.0, while the one under the competitor's bonnet gets 3.0 out of 5.

Performance & Fuel economy

Opel is undoubtly more agile, reaching 100km/h in 1.3 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 an obvious choice would be the German car, averaging around 9.2 liters of fuel per 100 kilometers (31 mpg), in combined cycle. That's 25% difference compared to the Italian car!


Alfa Romeo 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, the Italian car offers significantly better overall protection, taking the lead here. From there things take a different direction, with Opel being considerably quicker, thus putting more smile on driver's face. To make things even better, it consumps less fuel! All together, there's not much more to say, in this case I wouldn't even consider anything but Opel. In any case that's my personal view, built upon all the data available to me. What should decide here though is the way you feel about the two vehicles, and I hope you'll find my guidelines useful in the process. Also, you could use the oportunity to find out which car, everything taken into account, would be the perfect choice for you in the eyes of the virtual adviser, among more than 12.000 different ones in our database.

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