All the tunturi mopeds use almost the same puch motor,just a bit different.

These four first are called "Pappa Tunturi" because old guys drive with them. The english
name would be like "Granpa Tunturi"-

Tunturi Start Years when made (about) 70-82
-Two gears
-Gears are controlled by left leg
-Motor is started by kickstart by kicking the starting lever front-down.
-Motors model is Puch VS 50KX
-Carburator is Bing 11mm, it can be equiped with thing that you can change the fuel and air 
mixing by turning a screw. It is very useful.. 
-It runs about 45km/h
-It has 1.5 horse power (hp)

Tunturi Maxi 59-78 (about) 
-Two gears also
-Gears are controlled by left hand
-Motor can be started by rolling the starting levers round (same system as in bikecyckle)
-Motors model is Puch VS 50LF (LF means Luxus Finland) 
-If you run out of fuel the moped can be drived like a bikecykle
-Carburator 11mm bing some models like year -62 had a bigger carburator (12mm bing)
-It runs 45km/h
-It has 1.5hp

Tunturi Classic 82-88 (about)
-Two gears
-Gears controlled by left leg
-Motor is started by kickstart by kicking the starting lever back-down
-Motor looks just like Tunturi Superports motor only the insides have been changed.
-Carburator 11mm bing
-It runs 45km/h
-Tt has 1.5hp

Tunturi Automat ??-??
-Two gears
-Automatic transmission and clutch
-Motor is started like Tunturi Start

Tunturi Supersport ??-??
-Four gears
-On left leg one down and the others are up (gears)
-Motor is started like Tunturi Classic
-Cylinder is big and the cooling comes from wind/air.

Tunturi Sport ??-??
-Three gears but one gear can be added
-Gears are like in supersport
-Starting is same as in supersport
-actually the motor is same as in supersport but on gear is left off

Tunturi DX ??-??
-The outlook is a bit different than superport but the rest is the same..

Tunturi Tiger S
-It has almost same motor as Supersport but the gear spaces are smaller.
-It has a disc brake in front