The BMW actually has the same gbox (ZF) as the A6 bi tdi but mapped differently. Google ZF 8 speed and find out all sorts. I agree with john above bitdi is abit slushy in the lower gears and does sometimes kick down when it really didnt need to, that certainly contributes to a feeling of lag. The same official information place A6 as average reliability-wise, and 5 Series is more or less at the same level.We should definitely mention that owners of cars with the same powertrain as Audi A6 rank it on average as 5.0, while the one under the competitor's bonnet gets 4.7 out of 5. Performance & Fuel economy BMW E92 3 Series Coupe 335d (2006) vs BMW E60 5 Series 535d (2007) vs Audi A6 (C7) 3.0 TDI 204HP (2011) Magazine Outstanding sedans of the 80s which made history View Gallery. 30 Photos. That said, the 2014 A6 TDI's 3.0-liter V-6 turbodiesel, rated at 240-hp and 428 lb-ft of torque, is an excellent fuel-sipper. The EPA rated the engine at 24/38/29 mpg city The 3.0 TDI engine of the A6 was engineered with Audi’s latest diesel technology, using the common-rail direct injection system that injects diesel fuel with Bosch piezo-injectors in precise quantities into the cylinders. The two-stage turbocharged V6 diesel engine produces 313 horsepower (230 kW) making it the most powerful diesel engine of Having both cars powered by diesel engines and utilizing the 4-door sedan body style within the same 'Luxury car' segment, the only major difference here really is their wheel drive configuration (rear for the BMW and front in the case of the Audi). The first one has a BMW-engineered powertrain under the hood, a 4-cylinder, 16-valves 150hp unit N1E92Kp. Cars Compare 2016 BMW 535d Overview Details Exterior Interior MSRP Veh 1 $57,350 Veh 2 $59,500 Veh 3 $20,995 MPG (city/hwy) Veh 1 26 / 38 Veh 2 25 / 38 Veh 3 42 / 33 Horse Power Veh 1 255 @ RPM Veh 2 240 @ RPM Veh 3 162 @ RPM Acceleration (0-60) Veh 1 Sec Veh 2 Sec Veh 3 N/A Engine Veh 1 I-6 Veh 2 V-6 Veh 3 I-4 Transmission Veh 1 8-spd w/OD Veh 2 8-spd auto w/OD Veh 3 2-spd CVT w/OD Seating Capacity Veh 1 5 Seats Veh 2 5 Seats Veh 3 5 Seats Cargo Space Veh 1 CF Veh 2 CF Veh 3 N/A Monthly Payment Veh 1 $1,082 Veh 2 $1,123 Veh 3 $396 Cost To Own Veh 1 $64,280 Veh 2 $67,354 Veh 3 $30,299 Data provided by Popular Comparisons $10,000-$15,000 $15,000-$20,000 $20,000-$25,000 $25,000-$30,000 $30,000-$35,000 $35,000-$40,000 $40,000-$45,000 $45,000-$50,000 $50,000-$60,000 $60,000-$70,000 $70,000+