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Make
Model
Model
Variant
Variant
Engine
Engine
Badges
2006. - 2009. Production 2005. - 2011.
S - Sports car Vehicle class S - Sports car
coupe, 2 door Body style coupe, 2 door
Rear Wheel drive Rear
Safety
Dimensons & Volumes
4091 mm
Length 4427 mm
1781 mm
Width 1808 mm
1268 mm
Height 1310 mm
260 liters
Boot (min) 135 liters
260 liters
Boot (max) 135 liters
55 liters
Fuel tank 64 liters
Engine
Porsche
3.6 Boxer 325
Petrol Fuel Petrol
6 - Inline, 4 valves per cylinder Configuration 6 - Boxer, 4 valves per cylinder
Naturally Aspir. Aspiration Naturally Aspir.
2996 cc
Displacement 3596 cc
265 hp
Power 325 hp
315 Nm
Torque 370 Nm
Performance (manual gearbox)
manual gearbox - 6 gears
manual gearbox - 6 gears
1295 kg
Vehicle weight 1470 kg
5.7 s
Acc. 0-100 5.0 s
250 km/h
Top speed 285 km/h
12.6 l/100km
Cons. (urban) 16.1 l/100km
6.3 l/100km
Cons. (highway) 8.1 l/100km
8.6 l/100km
Cons. (average) 11.0 l/100km
207 g/km
CO2 emissions g/km
Performance (automatic gearbox)
automatic - 6 gears
automatic - 5 gears
1325 kg
Vehicle weight 1510 kg
6.0 s
Acc. 0-100 5.5 s
250 km/h
Top speed 280 km/h
12.8 l/100km
Cons. (urban) 16.5 l/100km
6.8 l/100km
Cons. (highway) 8.1 l/100km
9.0 l/100km
Cons. (average) 11.2 l/100km
217 g/km
CO2 emissions g/km
Expenses
13500 EUR
Price from 1 EUR
Virtual Adviser's™ opinion

Overview

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 coupe 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 265hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 325hp engine designed by Porsche.

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 it doesn't do much to help us decide between the two. On the other hand, taking kerb weight as an important factor into account, 911 offers a considerable difference of 14% more metal.

Reliability

Manufacturers have been building their reliability reputation for decades now and, generally speaking, it appears that BMW does have a slight advantage, at least on all of the models level. These are the official statistics, while our visitors describe reliability of BMW with an average rating of 4.3, and models under the Porsche badge with 2.5 out of 5. Unfortunatelly, I don't have enough insight that would allow me to comment in more details on the specific models level. Above it all, drivers of cars with 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

Porsche is a bit more agile, reaching 100km/h in 0.7 seconds less than its competitor. In addition to that it accelerates all the way to 285 kilometers per hour, 35km/h more than the other car. When it comes to fuel economy an obvious choice would be BMW Z4, averaging around 8.6 liters of fuel per 100 kilometers (33 mpg), in combined cycle. That's 28% difference compared to 911!

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 significantly better overall protection, taking the lead here. From there things take a different direction, with Porsche 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. 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™, out of 12.000+ vehicles we currently have in our database.
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