Build a Car Company Engines Tier List

Engines define how your cars feel in Build a Car Company—sales scores, crash outcomes, and race pace all hinge on the powertrain. This engines tier list ranks options by progression value for a typical factory-focused save.

Always re-crash-test after swaps. Pair picks with Design Cars.

S tier — buy when available

• Efficient mid petrol — best blend of score, reliability, and cost for volume sellers
• Tuned GT petrol — once unlocked, carries premium street and GT race specials

These engines raise model appeal without bankrupting tooling budgets. They are the backbone of Make Money Fast loops.

A tier — excellent core choices

• Starter petrol upgrade — first meaningful step above tutorial power
• High-torque street petrol — great for heavier bodies and rally-leaning builds
• Early race petrol — justified when you commit to Racing weekends

A-tier engines are rarely wrong. Choose based on body weight and series goals.

B tier — situational

• Peak horsepower petrol before chassis catch-up — fast on paper, fails tests on weak frames
• Economy micro engines on premium bodies — hurts brand scores
• Early experimental tech — fun, but RP and Cash often better spent on factory nodes first

Use B-tier when it uniquely fits a niche SKU, not as default.

C tier — transitional fillers

• Unupgraded tutorial engine — fine for five minutes, then replace
• Mismatched exotic previews — look ahead content that underperforms until research matures

Swap out as soon as an A/S option appears.

D tier — traps for most players

• Max power on day-one chassis — crash failures and refunds waste time
• Ignoring drivetrain match — engine tier means little if wheels cannot plant power
• Skipping tests “to save time” — reputation damage costs more than the test

Hydrogen and flying-car engines

Late research unlocks hydrogen and flying-car tech. Treat them as endgame flex until:

• Factory Cash per minute is comfortable
• Required research nodes are complete (Research list)
• You have a role for the vehicle (showpiece or specialized event)

On a fresh account they rank closer to B/C for progression value even if the fantasy is S-tier cool.

Matching engines to roles

Role	Target tier	Notes
Volume seller	S/A efficient petrol	Reliability over peak HP
Premium street	A/S GT petrol	Supports higher price
Drag special	A race petrol+	Traction setup matters
Rally special	A torque petrol	Chassis durability first
Formula	Highest legal race engine you can stabilize	Do not rush

Spending order after codes

1. Unlock/equip the best affordable A/S street engine
2. Fix chassis/drivetrain until crash tests pass
3. Only then tool a race engine variant
4. Revisit after updates

Redeem VROOM and other codes to accelerate step one.

Related pages

• Tier List Hub
• Research Priority
• Factory Guide
• Getting Started

Pick engines that your chassis, Cash, and research can actually support—then climb tiers as the company grows.

Quick shopping checklist

Before you click buy: confirm chassis research can hold the torque, confirm the SKU role still matches the engine personality, and confirm you still have Cash for a re-test iteration. Engines that look perfect in a YouTube late-game garage often sit one research node beyond your workshop.

After purchase, run crash test immediately, then a short test drive loop. If scores drop, roll back to the previous A-tier petrol rather than stacking cosmetics on a failing frame. Keep notes beside the engines tier list so the next session starts smarter.