I am self employed and buying a new motor vehicle. Is it better as self employed to take out a personal loan or a lease?

This is a question that is difficult to answer without first knowing your current financial position and future plans.
Another question that needs to be addressed is what is the type and intended use of the motor vehicle?
It is not common for a self employed person to purchase a motor vehicle using a personal loan but it is possible.
Apart from a personal loan to purchase a motor vehicle a self employed person may have the following finance type options to consider;

Chattel Mortgage
Commercial Hire Purchase
Finance Lease
Operating Lease
Equipment Rental

Employees may also be seeking a novated lease.
Contact a finance broker for more information on the different types of vehicle finance available for self employed persons and business.