Hi,
Engines of this kind can be seen in Poland today, too. I rendered it with Blender Internal (light cones and specular) and didn’t use textures. Just different color materials on different faces.
Hi,
Why “Blender Internal” ? What version of BLENDER are you using?
With the current version (2.83.4) you can choose between EEVEE and Cycles . . . or even other rendering engines.
Getting back to your rendering: 
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it lacks shadows that would allow to better discern the different parts of the model (with EEVEE activate Ambiance Occlusion…)
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still with EEVEE, activating Bloom would allow you to have a Glow effect on your headlights.
It’s 2.78 and BI has many possibilities such as SSS. And many not complex effects need complex, sometimes too complex, node tree. Still, I use Cycles every now and then as well, see my Letters work.
