Outrun

There is actually two 'Outrun' games on MSX. That monstrosity in your video (yeah, the MSX1 version is really bad) - and there is a MSX2 version - which isn't a very good "port", but at least is playable and a half decent game:

https://www.youtube.com/watch?v=4e2B-Au8Onc

Outrun for msx1 and also outrun for msx2 in my opinion, are games that in 80s made people to prefer other computers.
I remember yet when i bought it on tape. When it finished to load i simply said "really?" Thinking to bring it back to the shop.

I think it would be one of the title to remake in both version, as a serie like "hey man, you would make it in this way"
Uridium, Gauntlet, Pointless fighting are some example of this serie, just a way to say to the world that MSX could do this

the sms version does not have flicker sprites. this is strange to me because the n. of sprites/scanline is 8 for both VDPs.
Where the sms use two sprites to achieve 16 pixels wide the msx uses two sprites to achieve multicolor. so should be the same amount of sprites involved. Maybe a emulator trick?

I think is screen 4 should be doable better than the outrun for msx2
in msx1 i think there is no much room because of the limitations of sprites. Sure this gfx can be realized manipulating the nametable instead of bitblitting the entire road, increasing the speed.....
Maybe one could mix the patterns masked with sprites in both versions.
on the msx2 there are situations where the n. of sprites on scanline is relatively high. two opponents car+ferrari means = 4+4+6 = 14 sprites/scanline!
maybe the flickering algorithm could be done better allowing for a more distributed 'flickering'

Uridium 2 is screen 8 on msx 2 and IMHO should go in that serie
https://youtu.be/Za9tPEgOAgk

Anyway about outrun, I wouldn't be so drastic about dropping screen 5
I think that having precomputed the shape of the roads as polygons could give good results in terms of frame rate.
But I haven't investigated enough to be sure
for sure in screen 5 the cars and the other objects would zoom nicely
I would reuse the maze 3d scaling algorithm or store precomputed frames in rom
Raycasting on msx TurboR (4): https://youtu.be/8ffvdvpePY8

Or even port the Spectrum version to the MSX1. I know the game looks like a Spectrum port on the MSX but it isn't. The Spectrum has perfectly fine road handling and also has the two roads running side by side at the start which the MSX lacks.

It's been said by a few people that if you use an emulator and speed the Speccy version up, it actually isn't a bad version of Outrun at all.