What battery does the Fiat 400 421A use?

Fiat 400 421A takes a conventional 74 Ah, 750 A battery (278 × 175 × 175 mm), with the positive terminal on the right. We found 3 compatible batteries priced between 74,10€ — 90,20€. Check dimensions and positive terminal position before purchasing.

Can I install a higher capacity battery in my Fiat 400 421A?

Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Fiat 400 421A battery compartment and the positive terminal position matches.

How do I find the right battery for my vehicle?

Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.

What warranty do the batteries have?

All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.

How long does it take for the battery to arrive?

Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.

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Fiat 400 421A

Batteries for Fiat 400 421A

Fiat · 400

Which battery does a Fiat 400 421A need?

Specifications and battery: 421A

Fiat 400 421A takes a conventional 74 Ah, 750 A battery (278 × 175 × 175 mm), with the positive terminal on the right.

Recommended battery for this engine Car battery Varta E38 12V 74Ah 750A €90.20 incl. VAT

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Battery for this engine

Version	Technology	Capacity	Cold cranking (EN)	Size (L×W×H)	Polarity
Main	Conventional	74 Ah	750 A	278 × 175 × 175 mm	+ on the right

Data: vehicle specifications and the battery manufacturer's application catalogue.

EFB, AGM or conventional for this engine?

Rule of thumb for the Fiat 400 421A: fit the same technology as the original or better (conventional → EFB → AGM), with equal or higher capacity and cold cranking amps, and respect the size and terminal position of around 74 Ah.

🔧 Battery Expert Advisor

Battery analysis for your Fiat 400 421A

Quick answer You need an ordinary lead-acid battery of 74 Ah. Our recommendation: VARTA E38.

VARTAE38

ordinary lead-acid74 Ah750 A278×175×175

€90.20

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Prices and availability updated on 29/10/2026

Based on the batteries we found for your vehicle, our experts help you pick the right one.

📋 What we found

For your Fiat 400 421A we found 3 compatible conventional batteries.

📊 View AGM vs EFB vs Conventional — full comparison

⭐ Our recommendation

Our recommendation

For your Fiat 400 421A we recommend the VARTA E38 (ordinary lead-acid, 74 Ah). Varta is the world's leading manufacturer of starter batteries and supplies first-equipment (OEM) batteries to the major European car makers.

Rated 4.8/5 by 27 verified customers.
Get it tomorrow if you order before 6 PM.

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Verified selection

Class: Batteries for Construction and Agricultural Machinery
Brand: Fiat
Model: 400
Engine: 421A

Receive them tomorrow before 5 PM if you order before 6 PM (Spain mainland and Portugal only).

Before you buy: check 3 key points

Although the batteries shown are sourced from information provided by manufacturers, we recommend checking on your current battery:

Dimensions (length × width × height, including terminals and protrusions)
The dimensions shown are the maximum of the battery and include the height of the terminals, small ridges at the base and any lateral protrusions. Measure your current battery completely, from edge to edge. The new one must be the same size or slightly smaller — never larger, it would not fit in the housing.
Positive terminal (left or right viewed from the front — check the battery photo carefully)
Stand facing the battery, with the manufacturer's label facing you and the terminals on top. Locate the terminal marked with +: if it is on your right, it is "positive right"; if it is on your left, it is "positive left". Do not rely on how the battery is mounted in the car — the position is always measured looking only at the battery itself.
Technology (AGM, EFB or conventional — the same as your current battery or higher)
Depending on the manufacturer, the same technology may be labelled differently: AGM may also appear as VRLA, AGM Start-Stop or AGM Deep Cycle. EFB may appear as EF, EFB+ or Enhanced Flooded Battery. Conventional may appear as SLI, Lead-Acid, Wet or Standard. If your vehicle has Start-Stop, the battery must be AGM or EFB — never conventional.

If you have any questions, just ask us and we'll be glad to advise you with no obligation.

Conventional batteries

Standard lead-acid batteries.

3 products

Comparison table of available products
Category	Make	Reference	Capacity	Cold cranking	Dimensions	Technology	Price
Conventional batteries	VARTA	E38	74 Ah	750 A	278×175×175 mm	Conventional	€90.20	More info
Conventional batteries	VARTA	E43	72 Ah	680 A	278×175×175 mm	Conventional	€90.20	More info
Conventional batteries	KRONOBAT	MS-74.0	74 Ah	750 A	278×175×175 mm	Conventional	€74.10	More info

Frequently asked questions

: Fiat 400 421A takes a conventional 74 Ah, 750 A battery (278 × 175 × 175 mm), with the positive terminal on the right. We found 3 compatible batteries priced between 74,10€ — 90,20€. Check dimensions and positive terminal position before purchasing.
: Yes, you can install a higher capacity (Ah) battery as long as the physical dimensions fit your Fiat 400 421A battery compartment and the positive terminal position matches.
: Use the search tool by selecting your vehicle's make and model. Our system automatically filters compatible part numbers verified by our technicians. If you have any questions, contact us via WhatsApp.
: All our batteries come with the legal guarantee provided by consumer law against manufacturing defects. If a battery has a manufacturing defect, it will be replaced at no cost to the user.
: Under normal circumstances, batteries usually arrive within 1 to 2 days of ordering. However, there are some cases where delivery may take a little longer: peak seasons (Black Friday, Christmas, etc.), palletized shipments, occasional stock shortages, etc.
: In mainland Spain delivery takes 24-48 working hours if you order before 6:00 pm (Monday to Friday) and the battery is in stock; mainland Portugal takes 1 to 4 working days, the Balearic Islands 2 to 5 working days and other EU destinations 4 to 7 working days. Batteries are shipped fully charged and ready to install.

Batteries for Fiat 400 421A

Which battery does a Fiat 400 421A need?