2 car comparison AU XR6 / BMW 635CSi

[Vincenzo]

I decided to do a comparison between my XR6 and the BM I just bought. The outcome of this and MY opinion might surprise you.

First the XR6. I bought the vehicle with 142k on it in December 2010, drove it from Ipswitch to Darwin via Canberra covering 8,000km in six days. As of today the car has travelled 163k.

The BMW I bought in November 2012, drove from Perth to Darwin via Canberra covering just under 10,000km in 11 days. The car has 237k on it but engine and gearbox have less than 20,000km. So, to the comparison

Vehicle model
XR6 is AU 111 2001 5 speed manual
BMW is 635CSi 1986 5 speed manual

Claimed vehicle weights
XR6 - 1470kg
BMW - 1470kg

Standard engine power
XR6 - 164kw / 220bhp
BMW - 163kw / 218bhp

Estimated power with upgrades
XR6 - 186kw / 250bhp (CAI, headers, 100 cell cat & 2.5 sports system)
BMW - 179kw / 240bhp (Bored to 3.6litre and Alpina B10 chip)

Engine sound and feel
XR6 - has an almost flat torque curve and pulls strongly with a fairly constant acceleration through to 5,500 rpm, with a deep sound.
BMW - average acceleration to 3,500 rpm then my God it just hauls through to 6,000rpm with that typical BMW six sound.

Gearbox change / feel
XR6 - the change itself is smooth and has a short throw.
BMW - is silky smooth but a longer throw

As the AU is an overdrive 5th gear and the BMw is 1:1, the BMW feels like it has better roll on torque / acceleration

Claimed and seen top speed
XR6 - Unknown claimed but have seen 225km/h indicated
BMW - Claimed 230km/h to 240km/h - can only say Tacho showed 5,200rpm with a 1:1 5th, 3.07 diff.

Suspension and tyres / feel
XR6 - standard suspension, yokohama v550 235/45/17 tyres. The AU has fairly nuetral handling but can be provoked into oversteer with the right pedal quite easily.
BMW - Bilstein / Eibach shocks and springs in a sport mode, tyres are 16 x 8 fronts with 205/55/16 and 16 x 9 rears with 225/50/16’s all shod with Yokohama S-Drives. Though the staggered wheels / tyres may look nice it causes the car to have a tendency to understeer. Again this can be rectified with the right pedal.

The BMW sits slightly lower than the XR6 compliments of it's smaller wheels and tyres and suspension. With a slightly lower centre of gravity it has a better feel (only just) than the XR6 through the long sweepers. Both vehicles are consummate long distance haulers with abilty to cover 1,500km in a day and arriving fresh and relaxed.

Brakes
XR6 - 286mm drilled and slotted discs with EBC Redstuff pads.
BMW - 750iL front discs with 4 pot callipers, 635 rear discs with twin pot callipers

Brake feel
XR6 - has a high pedal feel with only gentle pressure needed with litttle or no fade.
BMW - pedal feels softer but stops smoothly with no fade

Interior look / feel
XR6 - black cloth interior, can seem a bit gloomy but dash layout / lighting is excellent with ease of access to all controls. Easily carry 5 adults.
BMW - cream leather interior, bright feel, all controls aimed toward driver. Interior lighting is poor. The dash uses an amber light and there is no interior lighting. Strictly a 4 seater, 2+2 (adults + small kids)

Fuel tanks / mileage
XR6 has a 68 litre tank, has covered 800+km from a tank from the 4 litre due to it's overdrive 5th. Around town 500+km easy.
BMW has a 70 litre tank, has covered 800+km from a tank but is more comfortable at about 750km range. Around town is unknown at this stage.

Overall thoughts.
The XR6 is a bit of a sleeper. It does not draw any undue attention. Around town it is easily the equal of the BMW in handling and it's ability to get things done and is my choice for town driving.

The BMW on the other hand stands out like canine testicles. It can draw unwanted attention. On a long distance trip it would be my choice but only just by a very close margin over the XR6.

A picture of the XR6



One of the BMW



Cheers and thanks for reading