Are diesel trains faster than electric?

Diesel locomotive engines are classified as diesel-mechanical (DM), diesel-electric (DE) and diesel-hydraulic (DH) engines. DM engines run at an average speed of 60 kmph, while DE engines travel at an average speed of 80 kmph, also the average speed of an electric engine.



No, electric trains are significantly faster and more efficient than diesel trains. The world's fastest high-speed trains (like the Shinkansen in Japan or the TGV in France) are all 100% electric. This is because electric motors can draw massive amounts of power directly from the overhead lines or a third rail, allowing for much faster acceleration and higher top speeds (often exceeding 186 mph or 300 km/h). Diesel-electric locomotives must carry their own "power plant" (the engine and fuel) on board, which adds immense weight and limits the available horsepower. The fastest diesel trains generally top out around 125–140 mph (200–225 km/h). Additionally, electric trains can use "regenerative braking" to recover energy, making them more sustainable. While diesel is still used in 2026 for freight and regional routes in areas without electrified tracks, almost all modern high-speed rail projects around the world utilize electric power for its superior performance and speed.

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Some locomotives collect electricity from overhead cables, while others take power from a third “live” rail on the track. It is very expensive to build the lines or rails that carry the electric current, but electric locomotives are cleaner, quieter, faster, and more reliable than steam or diesel engines.

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The locomotives weigh between 100 and 200 tons (91,000 and 181,000 kilograms) and are designed to tow passenger-train cars at speeds of up to 125 miles per hour (200 kph). Siemens' modern engines produce up to 4,200 horsepower, and the generator can turn this into almost 4,700 amps of electrical current.

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Because high horsepower is required for high-speed operation, the diesel is, therefore, less desirable than the electric for high-speed passenger services and very fast freight operations.

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The diesel-electric locomotive offered many advantages over its steam-powered counterpart. It needed less maintenance, used less fuel and could be operated with a smaller crew. It also didn't require expensive support structures like roundhouses, coaling towers and water tanks.

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Intercity 125 The stalwart of the British rail network merits its place on the list by being the fastest diesel train in the world, a record it achieved in 1987 and still holds today for travelling at a speed of 148 mph. Development of the 125 started during the 1960's and the first train entered service in 1976.

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As of August 2022, the fastest train on Earth, based on its record speed, is the Japanese L0 Series Maglev with a record speed of 603 kilometers per hour.

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One locomotive weighs about as much as 108 hippos These 6-axle engines have 4,400 traction horsepower and can reach a maximum speed of 70 miles per hour pulling thousands of tons of freight.

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Every battery locomotive that replaces a diesel will reduce carbon dioxide emissions by 3,000 tons per year, Wabtec estimates. But it is unlikely they can quickly replace diesel-powered trains.

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The main disadvantages of dual-mode locomotives are that they are more expensive to build and mechanically more complex, resulting in higher maintenance costs. They also lose some energy efficiency by carrying around the weight of one type of unused power plant (electric or diesel), while using the other.

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The Glacier Express is the world's slowest train, taking more than eight hours to travel between Zermatt and St. Moritz in Switzerland at an average of 18mph. Along the way, it passes over nearly 300 bridges, travels through 91 tunnels and takes in endless stunning Alpine views.

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The Flying Scotsman went in service in 1923 and was given its famous name a year later. The train connected passengers from London to Edinburgh. It rose to global fame when it recorded 100 mph (160 kph) on a special test run in 1934, making it the first locomotive in the U.K. to reach that speed.

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In addition, the tracks, signals, rail cars and software made in the U.S. are costlier than imports, largely because the government has not funded rail the way European and Asian countries have, experts say.

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Read on for the fastest trains in the world.
  • CRH380A Hexie: 302 mph. ...
  • Shanghai Maglev: 267 mph. ...
  • Hemu -430 X: 262 mph. ...
  • Fuxing Hao CR400AF/BF: 249 mph. Image Source: ...
  • The Frecciarossa: 245 mph. Image Source: ...
  • Shinkansen H5 and E5: 224 mph. Image Source: ...
  • Deutsche Bahn ICE: 205 mph. Image Source: ...
  • Korail KTX: 205 mph. Image Source:


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With high-speed rail, train travel is always faster than driving. In many cases, it's even faster than flying, once you factor in the whole air travel song-and-dance. And if you do need to catch a plane, trains make it easier to get to the airport.

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Diesels can still operate on electrified lines, they simply do not pull power from the overhead wires, instead burning diesel to generate power. There are no clearance problems for diesels to operate on electrified lines.

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No, trains have no gears, since these are unfeasible. That's why their fuel (if any) is converted to electric energy and then used to run motors.

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Most countries have a freight decarbonization goal. These typically include shifting from road to rail and also electrifying rail (IEA, 2019; OECD/ITF, 2021). This model shows that the rail freight industry could expect to see a positive net present value and emissions reductions globally through electrification.

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