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 (front for the Audi and rear in the case of the Porsche). The first one has a Audi-engineered powertrain under the hood, a 4-cylinder, 20-valves 150hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 320hp engine designed by Porsche.

The fact that the Audi 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 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 marginal difference of 5% more metal.

Reliability is not the best thing to consider on the make level, but it is worth mentioning that Audi does have a slight advantage, at least on all of the models level. That's the official data, while our visitors describe reliability of Audi with an average rating of 4.2, and models under the Porsche badge with 3.7 out of 5. Some independent research have also placed TT as average reliability-wise, and 911 is more or less at the same level.Above it all, drivers of cars with the same engine as Audi TT rank it on average as 4.5, while the one under the competitor's bonnet gets 5.0 out of 5.

Porsche is way more agile, reaching 100km/h in 3.6 seconds less than its competitor. In addition to that it accelerates all the way to 285 kilometers per hour, 65km/h more than the other car. When it comes to fuel economy an obvious choice would be Audi TT, averaging around 8.1 liters of fuel per 100 kilometers (35 mpg), in combined cycle. That's 36% difference compared to 911!

Porsche 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, Audi TT offers much better overall protection, which launches it ahead of the other contender. From there things take a different direction, with Porsche outracing its opponent in any situation possible, making it better choice for boy racers. 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 Audi. 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™, among more than 12.000 different ones in our database.