Want to be faster? Let's talk EFFICIENT vs. EFFECTIVE...

OK, let's float a controversial idea which runs distinctly against the status quo of swimming "fact".

Here's a very efficient road car (bear with us here this is about swimming):

It's a Volkswagen Polo 1.4 TDI, reaching 62mph (100kph) in 12.9 seconds with a fuel efficiency of 76.3mpg (3.7L/100km) on the combined European cycle.

All very respectable.

On t…