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Virtual Adviser's™ opinion
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 (front for the Alfa Romeo and rear in the case of the Nissan). The first one has a Alfa Romeo-engineered powertrain under the hood, a 4-cylinder, 16-valves 185hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 300hp engine designed by Nissan.
SafetyUnfortunatelly, 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, but that fact doesn't break the tie between the two cars. On the other hand, when it comes to weight, a factor that most people underestimate, the Japanese car offers a marginal difference of 8% more metal.
ReliabilityReliability is not the best thing to consider on the make level, but it is worth mentioning that Nissan is significantly less fault-prone, all the models observed together. That's the official data, while our visitors describe reliability of Alfa Romeo with an average rating of 4.2, and models under the Nissan badge with 4.3 out of 5. The same official information place Brera as average reliability-wise, and 350Z is more or less at the same level.That apart, owners of different cars powered by the same engine as the Italian car rank it on average as 4.8, while the one under the competitor's bonnet gets 5.0 out of 5.
Performance & Fuel economyNissan is undoubtly more agile, reaching 100km/h in 2.5 seconds less than its competitor. In addition to that it accelerates all the way to 250 kilometers per hour, 28km/h more than the other car. When it comes to fuel economy an obvious choice would be the Italian car, averaging around 9.4 liters of fuel per 100 kilometers (30 mpg), in combined cycle. That's 28% difference compared to the Japanese car!
Verdict
Nissan 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 Japanese car offers slightly better overall protection and takes the lead. It all continues in the same direction, with Nissan being considerably quicker, thus putting more smile on driver's face. It does come at a cost though, and that's the fuel consumption... No mistake, whatever you decide here, but I'd still go for the Alfa Romeo. 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™, among thousands of similar, yet so different vehicles.