This one was put together by bmw with a 2 litre v6 engine
No it wasn't

Pre 2001, they were built by Rover Group in Cowley (now the MINI plant)
2001-2002 they were built by MG Rover Ltd in Cowley (now MINI plant)
2003-2005 they were built by MG Rover Ltd in Longbridge
The engine is from Rover Group (pre 2001), Powertrain Ltd (post 2001)
The only cars that BMW allowed Rover to design were:
MINI (which BMW kept)
Codename '35' which was quickly rehashed into RWD, and became the BMW 1 series upon the split
75 - limited by BMW in design so as not to encrouce on their own 5 series, and actually ended up being more of a 3 series sized car.
Due to BMW's mismanagement
*, the only previous Rovers release in BMW's era were:
400 - this was already too far down the line for BMW to stop, and a commercial agreement with Honda was too expensive to get out of.
200 (bubble) - due to BMW not being prepare to invest, they used the previous design that was going to be released before the R7 (wedge 200s), and had to use 'new' designed parts from the R7 parts bin.
25/45 - although good improvements on 200/400, little more than evolutions/facelifts.
No real engine development in after 1994 when BMW took over either. The fact that the K series can, even now, hold their own against the crap that comes from the likes of Ford and Vauxhall is a testiment to the 25yr old motor...
* It was probably the intention of BMW to close Rover soon after buying. It was stated at the time that BMW bought Rover Group, not for a ongoing business, but for:
4x4 technology (that they still made a hash of) from Landrover.
Mass production design and techniques from Rover.
So it always makes me chuckle when people say, for example, my Omega has the BMW TD, as if the BMW part somehow makes it better...
Whilst the styling isn't to my taste, and its a tad small, the 75 is a great car, and pretty robust. Cambelts are a pig on the V6 models though. Every bit as good as the Vectras and Mundanos of the time. 45s and 25s are also decent little motors. Really miss our 25.