You will have to go to mediation before court or at least get a sign off.
A mediator is typically a former family law solicitor.
No solicitor can say what you will end up with in court as it's judge dependant and the law refers to needs..however in recent years higher courts have established a 50:50 principle and there would have to be a good reason to move away from it.
I was like you owning a mortgage free house, through my own hard work, prior to meeting Ex..I even had a deed which Ex had signed but in a long marriage it makes no difference.
If you can house yourself with 50:50 then that will be deemed as sufficient.
Sadly with the car, it depends..if the assets are considerable then a judge may view it as immaterial.
Your ex sounds hellbent on 50%, if he gets a supportive solicitor and barrister then it will get nasty and expensive but might not benefit you.
Unfortunately women are usually financially worse off after divorce which is hard to swallow but generally we are happier. It's a myth that women take men to the cleaners.
Do I regret court? I had no option as Ex's proposal was so low but it is a horrendous process and only the high conflict individuals thrive.Judges make strange decisions..often said on here "depends on what they had for breakfast and their mood".
Court is a risk as you are essentially handing over your finances to a Judge who can just wipe out your 150k in 5 mins...He or she decides what you can live on..plus you pay solicitors & barristers at least 25k for the privilege.
Once in the court system you rely on someone else to make decisions on your finances.
I would try mediation first, speak to the mediator and make sure you are happy. Mediation failed in my case but Ex chose a mediator who is known for poor control and she let Ex get aggressive, which should not have happened. I only found out afterwards.. I had naively thought Ex would be fair.