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

compare selected cars
2005. - 2011.
S - Sports car
coupe, 2 door
4 x 4
Badges
Production
Vehicle class
Body style
Wheel drive
Safety
2006. - 2009.
S - Sports car
coupe, 2 door
rear

Marketing

Dimensons & Outlines

4427 mm
1808 mm
1310 mm
135 liters
135 liters
64 liters
Length
Width
Height
Boot (min)
Boot (max)
Fuel tank
4091 mm
1781 mm
1268 mm
260 liters
260 liters
55 liters
2005 Porsche 911
2006 BMW Z4 Coupe

Engine

Petrol
6 - Boxer, 4 valves per cylinder
Nat. Asp.
3824 cc
355 hp
400 Nm
Engine
Fuel
Configuration
Aspiration
Displacement
Power
Torque
Petrol
6 - Inline, 4 valves per cylinder
Nat. Asp.
3246 cc
343 hp
365 Nm

Performance (manual gearbox)

 
kg
s
km/h
l/100km
l/100km
l/100km
g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
manual gearbox - 6 gears
1395 kg
5.0 s
250 km/h
18.2 l/100km
8.6 l/100km
12.1 l/100km
292 g/km

Performance (automatic gearbox)

automatic - 5 gears
1515 kg
4.7 s
280 km/h
18.0 l/100km
8.6 l/100km
11.9 l/100km
g/km
Gearbox type
Vehicle weight
Acc. 0-100
Top speed
Cons. (urban)
Cons. (highway)
Cons. (average)
CO2 emissions
 
kg
s
km/h
l/100km
l/100km
l/100km
g/km

Expenses

1 EUR
Price from
8800 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 coupe body style within the same 'Sports car' segment, the only major difference here really is their wheel drive configuration (4 x 4 for the Porsche and rear in the case of the BMW). The first one has a Porsche-engineered powertrain under the hood, a 6-cylinder, 24-valves 355hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 343hp engine designed by BMW.

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. 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, but that fact doesn't break the tie between the two cars. Furthermore, when it comes to weight, a factor that most people underestimate, 911 offers a marginal difference of 9% 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, when all the models are taken into account. That's the official data, while our visitors describe reliability of Porsche with an average rating of 3.8, and models under the BMW 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. We should definitely mention that owners of cars with the same powertrain as 911 rank it on average as 3.0 out of 5, exactly the same as the other one.

Performance & Fuel economy

Porsche is a bit more agile, reaching 100km/h in 0.3 seconds less than its competitor. In addition to that it accelerates all the way to 280 kilometers per hour, 30km/h more than the other car. When it comes to fuel economy things look pretty much the same for both cars, averaging around 12 liters of fuel per 100 kilometers (24 mpg), in combined cycle.


Verdict

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 Porsche offering somewhat better performance, just enough to call it quicker. To make things even better, it consumps less fuel! At the end, as much as I'd like to give you a winner here, it's simply a pure tie if you ask me. 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. 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, out of 12.000+ vehicles we currently have in our database.

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