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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 5-door hatchback body style within the same 'City car' segment, the only major difference here really is their wheel drive configuration (front for the Audi and rear in the case of the Smart). The first one has a Volkswagen-engineered powertrain under the hood, a 4-cylinder, 16-valves 185hp unit, while the other one gets its power and torque from a 4-cylinder, 16-valves 70hp engine designed by Renault.
SafetyBoth vehicles got tested by European New Car Assessment Programme (Euro NCAP), with the Audi being a slightly better choice apparently. That aside, let's consider some other aspects which affect safety. Both vehicles belong to the city car segment, which is generally not a very good thing safety-wise, but it doesn't do much to help us decide between the two. Furthermore, taking kerb weight as an important factor into account, Audi A1 offers a potentially life-saving difference of 36% more metal.
ReliabilityManufacturers have been building their reliability reputation for decades now and, generally speaking, it appears that Smart as a brand displays somewhat better results, 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 Smart badge with 3.9 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 Audi A1 rank it on average as 3.0 out of 5, exactly the same as the other one.
Performance & Fuel economyAudi is way more agile, reaching 100km/h in 9.9 seconds less than its competitor. In addition to that it accelerates all the way to 227 kilometers per hour, 76km/h more than the other car. When it comes to fuel economy the winner has to be ForFour, averaging around 4.2 liters of fuel per 100 kilometers (67 mpg), in combined cycle. We can't ignore that 40% difference compared to Audi A1.
Verdict
Smart 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 A1 beats the other contender by far, making it the best choice without even considering other things. It all continues in the same direction, with Audi 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 not difficult to say then that if I'd need to make a choice, it would definitely be the Audi. Nevertheless, let's not forget that people have different preferences and needs, so what really counts is your personal feel. I'm only here to help. 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 thousands of similar, yet so different vehicles.