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Cat Breed Comparison

British Longhair vs Persian: Key Differences

British Longhair and Persian are often confused. Compare their size, weight, lifespan, origin, temperament, and health — and learn how to tell them apart at a glance.

Quick Comparison

TraitBritish LonghairPersian
SizeMedium to LargeMedium to Large
WeightMales 9–17 lbs (4.1–7.7 kg), females 7–12 lbs (3.2–5.4 kg)7–12 lbs (3–5.5 kg)
Lifespan12–17 years12–17 years
OriginUnited KingdomIran (Persia)

Visual Differences

Telling a British Longhair from a Persian

Persians have a flat, brachycephalic face with a snub nose and a long, fine single coat that mats easily. British Longhairs have a normal-length nose with a visible stop and a denser, springier double coat that resists matting. The flat Persian profile in side view settles it.

British Longhair Key Markers

  • Semi-long, dense coat that stands away from the body, plush and springy like the British Shorthair coat but long enough to form a ruff around the neck, britches on the hind legs, and light feathering on the tail; the coat thickens in winter and sheds heavily in spring
  • Round head with full cheeks, a short nose, and a visible stop between forehead and nose; the muzzle is round and broad with a distinct whisker break, the same sweet, open expression as the British Shorthair
  • Large, round copper or gold eyes (blue in colorpoint varieties), set wide apart

Persian Key Markers

  • Round, wide head with a short snub nose, full cheeks, and a visible stop — a brachycephalic (flat-faced) profile is the breed’s hallmark
  • Large, round, vivid copper or deep blue eyes set wide apart, giving a sweet, open expression
  • Long, thick, silky coat with a fine texture and a prominent ruff around the neck and chest

Temperament & Personality

British Longhair

  • Calm and easygoing — happy to lounge near you without demanding attention
  • Affectionate on their own terms — enjoys being petted and sitting nearby, rarely insists on lap time
  • Quiet — communicates with soft chirps and glances rather than loud meowing
  • Good with children, dogs, and other cats — patient and rarely aggressive
  • Slow to mature — stays playful and kittenish until 3 to 5 years old
  • Low to moderate energy — enjoys short play sessions, then settles into long naps

Persian

  • Extremely calm and quiet — prefers serene environments over noise and activity
  • Affectionate and people-oriented but not demanding; happiest lounging nearby rather than on a lap
  • Low activity level — enjoys short play sessions but spends most of the day napping or observing
  • Gentle and patient with children and other pets — rarely scratches or acts out
  • Requires daily grooming — the long, fine coat mats easily without consistent brushing

Health Notes

British Longhair

  • Hypertrophic cardiomyopathy (HCM) — the most common inherited heart disease in the breed, shared with the British Shorthair; regular cardiac screening recommended for breeding cats
  • Polycystic kidney disease (PKD) — inherited from Persian outcross ancestry; a DNA test identifies carriers
  • Obesity — the low-energy, easygoing nature makes weight management a lifelong priority
  • Dental disease — the broad muzzle can crowd the teeth and raise gingivitis risk; regular dental care recommended
  • Hemophilia B (Factor IX deficiency) — a rare bleeding disorder documented in British lines; responsible breeders test before breeding

Persian

  • Polycystic kidney disease (PKD) — an inherited condition causing kidney cysts; before DNA testing became widely available, 38% of Persians were affected; a simple DNA test can identify carriers
  • Brachycephalic airway syndrome — the flat face can cause breathing difficulties, tear duct overflow (staining), dental crowding, and heat sensitivity
  • Progressive retinal atrophy (PRA) — a retinal degenerative disease leading to vision loss; DNA testing available
  • Hypertrophic cardiomyopathy (HCM) — regular cardiac screening recommended for breeding cats
  • Feline lower urinary tract disease (FLUTD) — Persians have a higher predisposition to bladder stones and urinary tract issues
  • Dermatophytosis (ringworm) — the dense coat makes Persians more susceptible to fungal skin infections

This information is for educational purposes only. Always consult a veterinarian for health advice specific to your cat.

Frequently Asked Questions

How can I tell a British Longhair apart from a Persian?
Persians have a flat, brachycephalic face with a snub nose and a long, fine single coat that mats easily. British Longhairs have a normal-length nose with a visible stop and a denser, springier double coat that resists matting. The flat Persian profile in side view settles it.
Are British Longhair cats hypoallergenic?
No — British Longhairs are not hypoallergenic. Their dense double coat produces normal levels of dander and sheds heavily in spring, so allergy sufferers should spend time with the breed before committing.
Are Persian cats hypoallergenic?
No — Persians are not hypoallergenic and are actually a challenging choice for allergy sufferers. They produce normal levels of the Fel d 1 allergen, and their long, fine coat traps and sheds dander and loose fur throughout the home. Daily grooming and regular cleaning help, but they do not remove the allergen entirely.

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Breed Profiles & More Comparisons

British Longhair

A British Shorthair with a longer coat: the same round head, full cheeks, and dense build, wrapped in a medium-long plush pelt. Calm, quiet, and slow to mature, it carries the easygoing British temperament without the grooming shortcuts of its shorthaired cousin.

Persian

The quintessential lap cat — famous for its luxurious long coat, large round eyes, and sweet, placid temperament. Persians are the most popular pedigreed cat breed worldwide, prized for their serene, gentle nature and unmistakable flat-faced (brachycephalic) profile.