BMW and Audi both jumped into the four-door coupe game a few years ago. When they got bored of it, they asked their tuning divisions to give them the hotter and meaner versions of their respective cars. And therefore, we now have on sale in India the fastest and most expensive iteration of the Audi A7, the RS7 and its arch rival from BMW, the M6 Gran Coupe - the beefed up version of the BMW 6-Series that was launched in the country earlier today. We do a quick comparo between these two machines to see how they fare against each other.
However, when you are comparing one premium luxury supercar to another, the differentiating factors usually boil down to the engine and powertrain features and of course, the price tag. The other factors such as comfort and entertainment features or tech gadgetry, which are although important becomes moot in such scenarios. Since, it is given that both the cars come loaded with an overwhelming number of advanced tech features for the price they demand. In terms of design and styling, both these coupes’ look stunning and have on offer a long list of customisable options. The aesthetics part then, becomes the question of individual taste and liking.
So, for the sake of comparison, we have restricted our base to the performance aspect of these two luxury supercars and find out if they justify the eyes-watering price tag.
Engine & Powertrain
BMW, just like most of their M badged cars, have packed the M6 Gran Coupe with the high performance 4.4-litre V8 engine that is capable of churning out 560PS of max power and 680Nm of peak torque. The engine is coupled with a fast shifting 7-Speed M-dual clutch transmission with paddle shifters. The 0 to 100 kmph mark is reached in mere 4.2 seconds. However, this timing is achieved under the ‘Competition Package’ that is being offered by the German automaker that pushes the power output to 575PS. Furthermore, the M6 Gran Coupe comes with Ecopro, Comfort and Sport+ modes, which are able to alter the characteristics of the car at the touch of a button.
On the other hand, the Audi RS7 is the faster and the most expensive iteration of the A7 sedan. It is equipped with a 4.0-litre, twin-turbo TFSi V8 petrol engine that is able to produce 560PS of max power and a massive 700Nm of peak torque. With these numbers, the RS7 Sportback is able to achieve the 0 to 100 kmph mark in mere 3.9 seconds with a restricted top speed of 255 kmph. However, without the speed limiter the RS7 races to a top speed of 305 kmph. The V8 engine sends power to all four wheels, courtesy of Audi’s trademark Quattro system though an 8-Speed automatic gearbox. It is worth noting that with these power and torque numbers, the RS7 Sportback is officially, Audi’s most powerful production car that develops 10PS more than the flagship - Audi R8 V10 Plus. Lastly, the said 4.0-litre engine also features cylinder de-activation technology, which shuts off four cylinders under low engine load for maximising fuel efficiency.
Audi India rolled out its RS7 Sportback in the country back in January 2014 with prices starting at Rs 1.29 crore. BMW India on the other hand, launched the new M6 Gran Coupe in the market today at a starting price of Rs 1.75 crore. (Both prices are ex-showroom, India.)
Unlike most automakers who have adopted the trend of downsizing engines in order to make their cars cleaner, greener and fuel efficient, the German duo don’t seem to have had their share of fun with the big, loud and fuel guzzling range of V8 engines. Of course, with the international emission norms getting stricter by the minute, the days of the mighty V8 could well be numbered. But just not yet.
Even though both the cars - the BMW M6 Gran Coupe and the Audi RS7 - deliver scintillating performance and tuneful soundtracks out of their respective V8 engines, the Audi’s 4.0-litre puts out 20Nm more torque than the BMW’s 4.4-litre V8. The RS7 is also faster than the M6 Gran Coupe.
At this point, if we have to quantify the cars by the numbers they put down on paper, we have to say that the Audi RS7 takes the top spot with its better performance and power output numbers and more importantly, the lower sticker price than the BMW M6 Gran Coupe.