The world's most expensive car is the Maserati Birdcage 75.
A person can buy a Berlingo car at various online car sales websites, most notably auto trader and car sales. One could also visit an auto dealer in the UK in order to purchase a Berlingo model vehicle.
Although it cannot be determined world wide as all country car sales vary. But America has Ford F-Series as its best top selling car at 179,632 sales in 2009
Toyota Corolla is the largest selling car in history. It took over the top spot from the Model T.
The Ford Camaro The first mass-produced car, the Ford Model-T.
http://en.wikipedia.org/wiki/List_of_automobile_sales_by_model provides a list of sales by car model. I trust that this information should be sufficient for what you are trying to do.
In terms of what? Speed? Handling? Sales?
The most interesting part of auto sales is the various methods the car salesmen employ to entice prospective buyers to get behind the wheel of a new model vehicle.
It was up until the VW Beetle broke the over 15 million sales record held by the Model T. The VW beetle sold over 21 million cars and is in 2nd place as of 2013. The Toyota Corolla with sales of over 39 million and still counting in the best selling model in the world.
The Ford RS2000 is an older car model and as such, is more difficult to find. One can find sales for the model from websites such as Car and Classic and CarBuyerz.
The most popular car was the Model T
As of December 2010 the General Motors Corp. has had the most auto sales.