I'm trying to find the typical* cold cranking amps required to start a Jaguar S-type 3 litre v6 petrol engine (UK) so that I can be more informed when I research batteries, boosters, chargers etc. I've tried searching for the answer to this question online to no avail.
* I know it might vary, so I am looking to get an approximation, an idea. Not an exact figure. Some further info to narrow it down...
- Weather: Cold but not freezing (let's say 10 °C).
- Time since last start - typcially 1 week (but sometimes won't start after a short journey has taken place and the car has been parked, then left for half an hour, this after about a week of no driving) - The car gets used on weekends
- Amount of charge in battery - Not dead, but not enough to start by itself.