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Car #1
Make
Model
Variant
Engine
Car #2
Make
Model
Variant
Engine

compare selected cars
2006. - 2009.
S - Sports car
cabriolet, 2 door
rear
Badges
Production
Vehicle class
Body style
Wheel drive
Safety
2005. - 2010.
S - Sports car
cabriolet, 2 door
front

Marketing

Dimensons & Outlines

4091 mm
1781 mm
1299 mm
240 liters
260 liters
55 liters
Length
Width
Height
Boot (min)
Boot (max)
Fuel tank
4393 mm
1830 mm
1318 mm
235 liters
235 liters
70 liters
2006 BMW Z4 Roadster
2005 Alfa Romeo Brera Spider

Engine

Petrol
6 - Inline, 4 valves per cylinder
Nat. Asp.
2497 cc
174 hp
230 Nm
Engine
Fuel
Configuration
Aspiration
Displacement
Power
Torque
Alfa Romeo
2.2 jts
Petrol
4 - Inline, 4 valves per cylinder
Nat. Asp.
2198 cc
185 hp
230 Nm

Performance (manual gearbox)

manual gearbox - 6 gears
1245 kg
7.1 s
229 km/h
11.8 l/100km
6.1 l/100km
8.2 l/100km
197 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
manual gearbox - 6 gears
1505 kg
8.8 s
222 km/h
13.0 l/100km
7.3 l/100km
9.4 l/100km
221 g/km

Performance (automatic gearbox)

automatic - 6 gears
1275 kg
7.7 s
225 km/h
12.0 l/100km
6.3 l/100km
8.4 l/100km
202 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
automatic - 6 gears
1505 kg
8.8 s
222 km/h
13.0 l/100km
7.3 l/100km
9.4 l/100km
221 g/km

Expenses

8800 EUR
Price from
3500 EUR

Virtual Adviser's™ opinion

Overview

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 (rear for the BMW and front in the case of the Alfa Romeo). The first one has a BMW-engineered powertrain under the hood, a 6-cylinder, 24-valves 174hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 185hp engine designed by Alfa Romeo.

Safety

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. Still, apart from the official crash test results there are other things we need to be aware of. Both vehicles belong to the sports car segment, which is generally classifying them somewhere in the middle safety-wise, but that fact doesn't break the tie between the two cars. On the other hand, if we'd like to consider vehicle mass in this context too, which we definitely should, the Italian car offers a considerable difference of 21% more metal.

Reliability

Reliability is not the best thing to consider on the make level, but it is worth mentioning that BMW does have a slight advantage, when all the models are taken into account. These are the results of an independent reasearch, while our visitors describe reliability of BMW, as well as Alfa Romeo, with the same average rating of 4.2 out of 5. Some independent research have also placed Z4 as average reliability-wise, and Brera is more or less at the same level.That apart, owners of different cars powered by the same engine as the German car rank it on average as 3.0, while the one under the competitor's bonnet gets 4.5 out of 5.

Performance & Fuel economy

BMW is undoubtly more agile, reaching 100km/h in 1.7 seconds less than its competitor. In addition to that it accelerates all the way to 229 kilometers per hour, 7km/h more than the other car. When it comes to fuel economy the winner has to be the German car, averaging around 8.2 liters of fuel per 100 kilometers (34 mpg), in combined cycle. We can't ignore that 15% difference compared to the Italian car.


Verdict

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 German car offers significantly better overall protection, taking the lead here. It all continues in the same direction, with BMW 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 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. 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, out of 12.000+ vehicles we currently have in our database.

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