A bit weird I’d say, maybe too numerical, though could work, it’s an easy and ituitive system at least.
As for what I use (I couldn’t miss such thread, I really like that part of making a brand)… I have a lot of brands, some of them with developed systems:
Zavir - I’m in the process of changing many things in it, so I’ll write about the outgoing system. Old models were named numerically in a slightly chaotic way… 2 digit numbers (and 100 for a late, transition era luxury model), 3x for the small cars, 4x/5x for compacts, 6x/7x for middle class, 8x/9x for executive and luxury cars - two, for some time even three separate lines, with different x values. 4/6/8 for the earlier period, 5/7/9 for the later. In this system the “x” could contain info about… model, generation, body, engine and trim linked with the engine. So for example 65 and 66 have little in common, 96 and 97 are completely different cars, but 55 and 59 are nearly the same thing That’s one of the reasons why I’m changing it. After that, up to the modern times cars have a pretty standard system of [actual name] + [engine] + [trim name], with the exception of special (sporty, luxury or whatever) trims available with one engine only. Luna 2.0 idea Veloce, Espada V8 Lusso, Squalo Sportivo, things like that. As for the engine naming - a letter for block material, if it’s not aluminium, a letter for configuration (usually first letter of an italian word for that number of cylinders - I4 = Q, quattro, V6 = S, sei and so on, but for example 90° V6s are denoted as R and I6s as I), two digits for maximum displacement (36 = 3.6 litre), a letter for valvetrain (O - OHC {DAOHC in game}, S - SOHC (OHC) 2v, T - 4v, D - DOHC 2v, E - 4v, F - 5v, G - 4v + VVL) - family name done. Then a digit for displacement substracted from maximum (S28E 5… = 2.3 V6 from a 2.8 family), a letter for fuel system (didn’t differentiate carbs, only injections), optionally a letter for additional systems (turbo and/or VVT) and a letter for ordering (A - 1st variant of such config, B - 2nd, and so on). This system is extremely flexible and the only problem is when you have two nearly the same engine families that differ only in bore/stroke ratio, but that’s quite rare I think.
Hypera - all cars are named with names from Nordic mythology, with supercars being named after monsters. Higher line of engines - Asgard, lower line - Midgard. Trims denoted by letters - S being the basic, GT the comfy one, R the aggressive one, C for cabrio and so on. Exceptionally crazy trims in addition to a letter get the “Lyn” name, “lightning” in Norwegian. That’s all
Griffa - hello, my no effort brand Names are also no effort type, sometimes real car names (Sirion, Aurion - both by accident, just wanted to use that generic type of name and then someone reminded me, that cars with such names exist), sometimes some normal words that just more or less fit (Rogue) or made up words that sound ok (Triseon) or come from sth that actually has a meaning (Anesion). Trims - engine capacity + two letters, one for engine type (E for economy/basic, S for sport, T for turbo - nothing special) and the other for trim (S, X… only these two used so far). Optionally “4” at the end to denote AWD. Done, one free Griffa Sirion 3.3 TX4 for you.
Orion - hello, my no effort stupid ideas brand For now just two cars - Visios, because it has huge windows and a glass roof, and XMS-1, eXperimental Mass Supercar One. Trim - XCT for example, eXecutive (equipment level) Cruiser (V8) Turbo. As simple as that, as I wrote, no effort
Both Griffa and Orion use the same engine naming system - one letter for config/general type (A - I3, B - I4, C - I6, D - V6, E - V8, F - V12, all universal engines, purely performance oriented get the next 6 or so letters, atypical next - whatever), one for the exact family (that includes cylinder size, but not count - BJ and CJ can be I4s and I6s from the same modular family - and materials, bore/stroke and valvetrain, basically everything in the engine family tab in the designer except the cyl. count), two digits for the variant capacity (33 = 3.3 litre), one letter for a defining trait (turbo, high performance N/A, injection, focus on economy - whatever), optionally one or two for additional traits. That’s a less rigid, less intuitive, but nearly unlimited system. Example - CJ33TSE, some iron DOHC 3.3 I6 with turbo that tries to be sporty and economical in the same time.