NGT6D / MGT6D

Updated: August 2026 – Three car sections, six axles, low entry: NGT6D and MGT6D are the compact members of the first German low-floor generation. This page explains what’s behind the two codes, which features you can actually count on the vehicle, and how to tell them apart from the longer sister types.

What are NGT6D and MGT6D?

NGT6D and MGT6D are six-axle low-floor articulated railcars for tram operation, in the classic version made of three car sections with two joints. They belong to the vehicle generation with which German tram operators introduced step-free entry in the 1990s.

The difference between the two codes doesn’t lie in the basic concept but in the fitment: different operators procured closely related variants of the same type, adapted to their network, their platforms and their workshop equipment. For identification in the field, both behave the same – what matters is the axle count, not the leading letter.

Why the axle count is the decisive number

For railway vehicles, the class number is purely an administrative one. For trams of this generation, by contrast, the type name is a short description: the digit names the axle count, and almost everything else follows from it – length, capacity, number of doors.

Once you’ve practised this system once, you can apply it to almost every German tram type. The methodical framework behind it – rough features first, number last – is set out in the guide to identifying rolling-stock classes.

What the vehicle delivers in everyday network use

Six-axle cars were procured where a compact unit is enough: on lines with closely spaced stops, tight radii and moderate passenger volume. The longer types cover the main axes. For observers, that gives a useful rule of thumb.

Situation	What you’ll typically see	What that means for you
Dense inner-city line	Short to medium vehicles, high frequency	Many opportunities, short dwell times
Main axis with high volume	Longer types or double-heading	Fitting the whole length into frame is harder
Depot exit in the morning	Vehicles in loose succession	Good chance of rare car numbers
Engineering works and diversions	Unfamiliar types on unfamiliar lines	Sightings especially worthwhile
Late-night service	Reduced vehicle deployment	Less choice, but calmer subjects

What was technically new about the first low-floor generation

The switch to low entry sounds like a minor detail, but it was the biggest design shift in German tram history. On a classic high-floor car, the vehicle floor sits above the wheels, connected by continuous axle shafts and normal bogies. That’s exactly what prevents a low floor.

The first low-floor generation solved the problem with a compromise you can still see on the vehicle today:

• Short running gear instead of long bogies. It needs less space, sits under the joints and leaves room in between for a low floor.
• Many short car segments. The shorter a segment, the less space has to sit above a running gear unit – the price is extra joints and bellows gangways.
• Platforms inside the interior. The floor stays high over the running gear. That’s why the first generation isn’t low-floor throughout, but low-floor around the doors.

Only later vehicle generations achieved a continuously flat vehicle floor. For identification, that’s the single most valuable piece of information: platforms inside mean the first generation, a continuously flat floor means a newer type. From outside, you can spot this at the lower edge of the windows, which runs visibly higher over the running gear – a feature that’s still readable in photos too.

Incidentally, this technical background also explains why the axle count appears in the type name rather than the number of car bodies: the number of running gear units determines weight, drive power and maintenance effort – and therefore what matters to the operator about the vehicle. Fitted to each running gear unit, in turn, is equipment from suppliers such as Hanning & Kahl, whose brake technology is widespread in this vehicle generation.

Photo tips for short articulated cars

The six-axle car is a rewarding subject to photograph, because it fits fully into frame without you having to step far back. That’s exactly where the typical trap lies: stand too close, and you get strong converging lines and a distorted front.

• Keep your distance and increase focal length. A slight telephoto from further back looks calmer than a wide angle taken up close.
• Choose a three-quarter view. An angle of around 30 to 45 degrees shows front and side at once and makes the joints visible.
• Watch the transition. The bellows gangways are the feature that defines the articulated car – a crop that cuts them off loses information.
• Keep the number legible. Without a car number, a picture is only half a documentary record.

How to capture a moving tram cleanly without losing the vehicle in the frame is shown in the guide on photographing a moving tram. For finding vantage points in your own network, the tram spotter map helps.

Common mix-ups

The realistic mix-ups are vehicles of the same family and the same era. Closest is the eight-axle NGT8D – identical basic idea, two more axles. Much the same applies to Dresden’s NGT6DD, which is likewise six-axle but tailored to a different network. Quite different is the case of the Tatra T4D: high floor, steps, a distinctly older appearance.

Conclusion

NGT6D and MGT6D are textbook examples of how much information sits in a tram type name. Six axles, three car sections, low entry – that’s all you need to identify it. They’re especially interesting right now, because the first low-floor generation is the oldest in many networks and is being replaced step by step.