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Compare any two cars and get our Virtual Adviser™ opinion

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

compare selected cars
2004. - 2007.
S - Sports car
cabriolet, 2 door
rear
Badges
Production
Vehicle class
Body style
Wheel drive
Safety
2005. - 2010.
S - Sports car
cabriolet, 2 door
4 x 4

Marketing

Dimensons & Outlines

4820 mm
1855 mm
1373 mm
300 liters
350 liters
70 liters
Length
Width
Height
Boot (min)
Boot (max)
Fuel tank
4393 mm
1830 mm
1318 mm
235 liters
235 liters
70 liters
2004 BMW 6 Series Cabrio
2005 Alfa Romeo Brera Spider

Engine

Petrol
6 - Inline, 4 valves per cylinder
Nat. Asp.
2996 cc
258 hp
300 Nm
Engine
Fuel
Configuration
Aspiration
Displacement
Power
Torque
Alfa Romeo / General Motors
3.2 Busso V6 JTS
Petrol
6 - V config, 4 valves per cylinder
Nat. Asp.
3179 cc
260 hp
322 Nm

Performance (manual gearbox)

manual gearbox - 6 gears
1685 kg
6.9 s
250 km/h
13.6 l/100km
7.3 l/100km
9.6 l/100km
229 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
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

Performance (automatic gearbox)

automatic - 6 gears
1695 kg
7.2 s
250 km/h
14.2 l/100km
7.5 l/100km
9.9 l/100km
238 g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
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

Expenses

6000 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 4 x 4 in the case of the Alfa Romeo). The first one has a BMW-engineered powertrain under the hood, a 6-cylinder, 24-valves 258hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 260hp engine designed by Alfa Romeo.

Safety

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, if we'd like to consider vehicle mass in this context too, which we definitely should, the German car offers a marginal difference of 1% more metal.

Reliability

I don't like generalizing things when it comes to reliability, although it does seem that BMW does have a slight advantage, all the models observed together. These are the official statistics, 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 6 Series as average reliability-wise, and Brera is more or less at the same level.Above it all, drivers of cars with the same engine as the German car rank it on average as 3.0, while the one under the competitor's bonnet gets 5.0 out of 5.

Performance & Fuel economy

BMW is a bit more agile, reaching 100km/h in 0.1 seconds less than its competitor. In addition to that it accelerates all the way to 250 kilometers per hour, 10km/h more than the other car. When it comes to fuel economy the winner has to be the German car, averaging around 9.6 liters of fuel per 100 kilometers (29 mpg), in combined cycle. We can't ignore that 20% 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 slightly better overall protection and takes the lead. It all continues in the same direction, with BMW offering somewhat better performance, just enough to call it quicker. 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. 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. I suggest you spend two more minutes in order to find out which car, based on your needs and budget, would be picked by the virtual adviser, among more than 12.000 different ones in our database.

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