Open the fuel filler door. If it says "diesel fuel only" inside, it is a TDI; if it says "unleaded fuel only" it cannot be a TDI because TDI is a diesel engine. As to telling if it's a GTI...all GTIs I know of have thin red accent stripes, but if you got yours used it's possible the previous owner removed all signs of your car's GTIness.
ask a mechanic
Yes, it is a Golf but VW stopped calling it the "VW Golf... GTI". Just as VW didn't call the R32 a Golf (although it is based on the VW Golf and has the same shape and many common components).
what oil do I use for a 59 reg vw Passat 2.0 tdi
Steps to changing the timing belt on a 2005 VW Jetta Wagon 1.9 TDI?
no
cal vw or your local parts store and they will tell you.
vw tdi
Mexico.
where is vw golf gti engine number
i have a 2002 vw golf tdi, i found a oil that i use that is approved by vw, its a castrol syntec 5w-40
VW TDI.....Volkwagon Turbo Diesel Injected ...sound good? that's what it means.
the golf gti is volkswagens performance/hot hatch car while the golf tdi is a turbodiesel and is generally slower unless highly modified