Sofia Car Rental. Alfa Group offers car rental from 20 € to 220 € for the country and abroad. We offer a varied car park for rentals for Bulgaria and abroad with guaranteed quality, no hidden fees and additional insurance with no limited mileage. Rent a car gas or economy diesel, rented luxury cars or a mini 8 + 1 bike for your summer trip. Guaranteed low-quality quality by Alpha Group Ltd., Sofia. For more information visit our site or call us.