In the Roblox logistics simulator Overfreight by OneSkyVed, choosing between diesel and electric locomotives depends on your network infrastructure, budget, and operating mode. Diesel trains are flexible workhorses that run on any track type and can directly service industry platforms, while electric trains deliver substantially higher top speeds and acceleration but require fully electrified tracks and cannot enter station platforms in Realistic Mode.
Locomotive Comparison and Stats
Overfreight features distinct tiers of Czech-inspired locomotives. Rolling stock wagons cost $750 each regardless of car type, and trains can couple up to three locomotives together once you unlock the Connected Locomotives research.
| Locomotive | Type | Tier | Top Speed | Length | Base Purchase Price | Track Requirement |
|---|---|---|---|---|---|---|
| ČD Class 740/742 "Tomcat" | Diesel | Tier 1 | 80 km/h | 13.6 m | $3,250 (Wiki lists $2,500–$3,250) | Any track type |
| ČD Class 750/754 "Brejlovec / Goggles" | Diesel | Tier 2 | 110 km/h | 16.6 m | $20,750 | Any track type |
| ČD/ZSSK Class 362 "Fast Eso" | Electric | Tier 3 | 140 km/h | 16.8 m | $120,750 | Fully electrified track |
| Rusty Electric Locomotive | Electric | Tier 3 | 91 km/h | 16.8 m | Free (Unlocked via "A nice gift" badge) | Fully electrified track |
| ES 64 U "Taurus" (ČD/ÖBB 1216) | Electric | Tier 4 | 230 km/h (Up to 300 km/h via research) | 19.3 m | $650,750 | Fully electrified track |
Diesel Locomotives: Versatility and Early Game
Diesel locomotives serve as your primary power units throughout the early and mid-game stages. Their defining advantage is universal track compatibility: diesel engines can travel across basic starter tracks, upgraded 90 km/h rails, 160 km/h generic rails, and electrified tracks without restriction.
Key operational characteristics of diesel trains include:
- Lower Infrastructure Barrier: You do not need to spend extra capital electrifying your network to get a diesel route running. Starter diesel engines come bundled with one cargo wagon.
- Platform Access: In Realistic Mode updates, diesel shunters are required to enter factory loading and unloading bays directly.
- Power Scaling: The Tier 2 ČD 750/754 diesel locomotive reaches 110 km/h and provides double the tractive power of the starter Tomcat, making it capable of pulling extended multi-car manifests before you transition to catenary infrastructure.
While the game does display visual exhaust from diesel chimneys, Overfreight contains no active pollution mechanic or penalty for running fossil-fuel engines.
Electric Locomotives: High Speed and Mainline Capacity
Electric locomotives represent late-game hauling power. Unlocked through research, electric units offer massive increases in acceleration and top speed, cutting travel times across expansive maps such as Mountain Insanity and Twin Peaks.
Critical factors when deploying electric trains include:
- Full Catenary Dependency: Electric trains will stop and fail if any section of their scheduled route lacks electrified track. Upgrading extensive railway corridors to electric rails requires significant capital (often hundreds of thousands of dollars for network-wide conversion).
- Superior Top Speed: The standard Tier 3 Class 362 runs at 140 km/h, while the Tier 4 Taurus reaches a base speed of 230 km/h and can be upgraded to 300 km/h through high-tier research.
- Faster Acceleration: Electric engines pull heavy consists—such as 10-car or longer ore lines—up steep mountain inclines far more efficiently than single diesel units.
- Starter Electric Gift: Upon researching electric traction, players unlock the "A nice gift" badge, which grants a free Rusty Electric Locomotive. While slower at 91 km/h, it provides an immediate electrified hauler without paying the $120,750 Tier 3 purchase price.
Realistic Mode and Locomotive Switching
In Realistic Mode, gameplay rules prevent electric locomotives from pulling directly into factory platforms. To maximize throughput on long-distance routes, players must construct rail yards and execute locomotive switching:
- Build Transfer Yards Near Factories: Place a yard with multiple tracks near your origin industry (such as a coal mine) and another yard near your processing plant or freight terminal.
- Assign Diesel Shunters to Yards: Assign a diesel locomotive to each yard and enable the "Use only assigned locomotives" setting in the yard options. This diesel shunter pulls empty wagons into the factory platforms, loads them, and returns them to the yard siding.
- Electrify the Mainline Connection: Lay an electrified double-track mainline connecting Yard 1 to Yard 2. Include electrified bypasses or switchback spurs within the yard boundaries so electric locomotives have room to maneuver.
- Assign Electric Locomotives for Inter-Yard Transit: Assign electric locomotives to run the transit route between Yard 1 and Yard 2. Wagons arriving at the yard will automatically uncouple from the diesel shunter, hitch to the electric locomotive for high-speed line haul, and swap back to a diesel shunter at the destination yard.
- Set Station Shunting Mode: Stations and factories offer shunting mode options including Turnaround, Terminus, and None. Setting the platform configuration to "None" enables push-pull operation, preventing unnecessary locomotive deadheading.
World Tunnel Compatibility
The World Connection industry allows players to send freight across servers to other players' plots. Track requirements for the World Tunnel mirror standard mainline mechanics:
- Connecting non-electrified track to the World Tunnel restricts usage strictly to diesel consists.
- Connecting electrified track permits both diesel and electric trains to enter the portal.
- All tunnel lanes are bidirectional, requiring proper cross-over trackwork and signaling on the approach tracks to avoid head-on blockages.
Frequently Asked Questions
Can diesel trains run on electrified tracks?
Yes. Diesel locomotives can traverse all track types in Overfreight, including electrified tracks, generic tracks, and basic rails.
Why won't my electric train move?
Electric locomotives require electrified rail across their entire path. If a single switch, crossover, or segment leading into a station or tunnel entrance is non-electrified, the train will be unable to proceed. In Realistic Mode, electric locomotives cannot enter factory platforms directly and must be exchanged for diesel shunters at an adjacent yard.
Can you combine diesel and electric locomotives in one train?
Using the Connected Locomotives research, you can couple up to three locomotives together.
How much do extra rail cars cost?
All standard rolling stock wagons—including gondolas, wood cars, container cars, and passenger cars—cost $750 each to add to a consist. Platform capacity limits determine how many cars can load at a given station level without splitting the train.
