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 Toyota-engineered powertrain under the hood, a 4-cylinder, 16-valves 223hp unit, while the other one gets its power and torque from a 6-cylinder, 24-valves 364hp engine designed by Nissan.

Both vehicles got tested by European New Car Assessment Programme (Euro NCAP), with the same number of safety stars gained in the process. Still, apart from the official crash test results there are other things we need to be aware of. Both vehicles belong to the large family car segment, which is generally a good thing safety-wise, still it doesn't help us solve our dilemma, does it? On the other hand, 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.

Manufacturers have been building their reliability reputation for decades now and, generally speaking, it appears that Lexus does have a slight advantage, when all the models are taken into account. These are the results of an independent reasearch, while our visitors describe reliability of Lexus with an average rating of 4.9, and models under the Infiniti badge with 4.5 out of 5. The same official information place IS as average reliability-wise, and Q50 is more or less at the same level.We should definitely mention that owners of cars with the same powertrain as Lexus IS rank it on average as 5.0, while the one under the competitor's bonnet gets 3.0 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... It's really tough to make a final decision here, but if I'd need to, I'd say Lexus. 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. 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™, among more than 12.000 different ones in our database.