Re: A6 Avant / Passat Estate size comparison? – 23-08-2009, 08:12 PM. Just got rid of my passat, also have an a4 and a6. The boot space is pretty close to the a6 but the rear passenger leg room is much more on the a6 than the passat and the a4 is just small by comparison. To me no contest A6 all the way. Boot space in the A6 Avant is great for bikes and rear legroom fantastic. I’ve gone from a ‘15 A6 Avant into an ‘07 RS4 Avant. I realise the RS4 is a few generations old and they’ve grown 628 registered specifications for Audi A6 Avant. Engine & Performance, Dimensions & Weight, Exterior, Interior, Features, Safety & Security and Other. The Contenders Audi A6 Avant 2.0 TDI 190 Black Edition S tronic. List price when new £41,600 Price today £21,000* Available from 2011-2018 What are the dimensions of A6 Avant 2005 and its fuel capacity and the overall weight? Fuel Capacity. 80 litres. Weight. 1815kg. Length. 4933mm. Width. What is the gross weight, 2018 Audi A6 Avant (C8) 40 TDI (204 Hp) quattro S tronic? 2425 kg 5346.21 lbs. How much trunk (boot) space, 2018 Audi A6 Station wagon (estate)? 565 l 19.95 cu. ft. How many gears, What type is the gearbox, 2018 Audi A6 Avant (C8) 40 TDI (204 Hp) quattro S tronic? 7, automatic transmission S tronic Being a large estate car, it’ll come as no surprise that Audi RS6 Avant practicality is excellent. The large 565-litre boot expands to a huge 1,680 litres when the rear seats are folded down, offering capacious luggage space when required. Inside the RS6 you’ll easily fit four adults and their luggage. Five will fit with a squeeze. 2012. 204 hp / 150 kW. 2967 cm3 (181.1 cu-in) Specs for all Audi A6 (C7) Avant. Engine technical specs, power, CO2 emissions, mpg fuel consumption, top speed, 0 to 60 mph, dimensions, tires size, weight. Read what our experts think about the practicality, boot size and overall dimensions of the Audi A6 Avant (1998 - 2004), plus how it compares to its rivals and more. Primary Navigation Mobile Close menu What engine is in 2021 Audi A6 (C8) Avant RS6? The 2021 Audi A6 (C8) Avant RS6 has a V 8, Petrol engine with 3996 cm3 / 243.9 cu-in capacity. How many horsepower (hp) does a 2021 Audi A6 (C8) Avant RS6 have? The 2021 Audi A6 (C8) Avant RS6 has 600 PS / 592 bhp / 441 kW. How much does a 2021 Audi A6 (C8) Avant RS6 weighs? The 2021 Audi A6 (C8 egE3.