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 large family car segment and utilize the same 4-door sedan body style and the rear wheel drive system, it all comes up to the specific hybrid engine choice they offer. The first one has a Nissan-engineered powertrain under the hood, a 6-cylinder, 24-valves 364hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 223hp engine designed by Toyota.

The first thing to look into here would be the results from European New Car Assessment Programme (Euro NCAP) tests performed on the two cars. Good thing is that both vehicles got tested, with the same number of safety stars gained in the process. That aside, let's consider some other aspects which affect safety. Both vehicles belong to the large family car segment, which is generally a good thing safety-wise, but that fact doesn't break the tie between the two cars. Furthermore, if we'd like to consider vehicle mass in this context too, which we definitely should, Q50 offers a marginal difference of 8% more metal.

Reliability is not the best thing to consider on the make level, but it is worth mentioning that Lexus does have a slight advantage, all the models observed together. These are the official statistics, while our visitors describe reliability of Infiniti with an average rating of 4.6, and models under the Lexus badge with 4.9 out of 5. The same official information place Q50 as average reliability-wise, and IS is more or less at the same level.That apart, owners of different cars powered by the same engine as Q50 rank it on average as 3.0, while the one under the competitor's bonnet gets 5.0 out of 5.

Infiniti is way more agile, reaching 100km/h in 3.2 seconds less than its competitor. In addition to that it accelerates all the way to 250 kilometers per hour, 50km/h more than the other car. When it comes to fuel economy the winner has to be Lexus IS, averaging around 4.3 liters of fuel per 100 kilometers (66 mpg), in combined cycle. We can't ignore that 44% difference compared to Q50.

Lexus is apparently more reliable, not too much, but just enough. 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, Q50 offers slightly better overall protection and takes the lead. It all continues in the same direction, with Infiniti 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... No mistake, whatever you decide here, but I'd still go for the Infiniti. 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. 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.