Newbie here. Advance apologies if this is a common one and I'm just being dumb! but I've had a bit of a search, and can't find the answers. So hoping to tap the collective knowledge...
Very excited as I have inbound, a new (to me) Sigma engined 7. My first.
I'm trying to work out if its the older Fixed Cam variant, or the later Ti-VCT with the variable timing. Is there an easy way to tell? Without taking the head off of course...
I'm told my car is a late sigma Ti-VCT with 140bhp. It was first registered in 2016, but was an owner built kit, so presumably left the factory a year or two previously. Curiously it has Roadsport badging, but is being sold as a 270 - which I thought would mean 135 Bhp??
I know the sigma has been used since around 2006 in 125, 150, 140bhp states of tune. And 135 in the current 270 and of course 152 in the 310. It's not an early 150 - it doesn't have the throttle bodies (assuming I have that right)
Trying to work out what it actually has under the bonnet! I'm buying from a well regarded 7 specialist so I'm not worried. Just independently checking the details and learning...
A few things here:
1. When did the Ti-VCT units take over from the fixed cam sigmas?
2. When did the Road sports give way to the 270 (I think this is around 2015?)
3. Was the 270 ever sold with 140bhp (was it detuned to create more room to the 310?)
Any facts gratefully received. Looking forward to years of ownership and membership!