Awwww no way! I typed up a big long post about this earlier but it's vanished... I mustn't have hit the button; well here goes again..!
Leroy has pointed out the VAT won't be repayable, but that doesn't necessarily mean that company car is a bad way to go - for some reason this seems to be the "conventional wisdom" but I'm not certain it holds up, given how costly fuel is now, and with mileage rates having reduced as well...
At an OMV of €45k and business mileage of 20k kms that means a 30% BIK, so an additional €14.5k of notional income. Assuming you're a high rate taxpayer that's additional tax, PRSI & USC payable of nearly €8k.
On the flip side of this, the extra €14.5k of notional salary is a deduction for the company, as will be all of the running costs, tax, insurance, servicing and fuel. As well as the lease rentals/capital allowances (whichever is applicable), and interest charge on any HP/loan finance.
Assuming the company is otherwise profitable, these deductions (€14.5k + all the others totalling nearly the same again - we'll call it €25k in total) save over €3k in tax in the company. That's a net cost, in tax terms, of €5k.
Now lets consider private ownership of the car by you, and expensing your business miles: 20k kms results in just over €7.5k in tax free expenses. Out of this you have to pay for all the petrol/diesel, running costs, tax, insurance, tyres, servicing etc, as well as servicing whatever type of finance you acquire the car under. Obviously not feasible - so you're going to have to draw additional salary out of the company to fund these expenses, but you'll be paying income taxes at 52% in order to get your hands on the cash to pay these costs, rather than having the company cover them.
It'd require a comprehensive jobby on a spreadsheet to thrash it out, but particularly in a case where the business mileage is higher and the BIK % is lowerI'd say company car might edge it...