Bullmastiff vs. English Mastiff: What's the Difference?

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Key Difference

Both, Bullmastiff and English Mastiff are the large sized dog breeds of English origin. With even many of the other similarities, both the breeds can easily be differentiated. There are many other known mastiff breeds which they are often compared with. Some of the famous mastiff breeds are Argentinian Mastiff, Brazilian Mastiff, French Mastiff, and Italian Mastiff. Generally, mastiff dogs are large sized as the term mastiff means a large molosser dog (solidly built and of large size).  To differentiate it between Bullmastiff and English Mastiff, one should know that Bullmastiff was obtained as a result of cross between English Mastiff and Bulldog, whereas English Mastiff is an ancient dog, which fought alongside British soldiers in 55 BC. English Mastiffs are said to be descendant of Alaunts.

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Comparison Chart

Bullmastiff English Mastiff
OriginBullmastiff was obtained as a result of cross between English Mastiff and Bulldog.English Mastiff is an ancient dog, which fought alongside British soldiers in 55 BC. English Mastiffs are said to be descendant of Alaunts.
Height & WeightAn average Bullmastiff is around 24 to 27 inches tall and weighs it around between 100-130 lbs.An average English Mastiff is around 27.5 to 30 inches tall and weighs it around between 120-200 lbs.
Lifespan8 to 10 years10 to 12 years
AggressiveMoreLess

What is Bullmastiff?

Bullmastiff is the large sized dog that was bred as a result of cross between English Mastiff and Bulldog in England. In records Bullmastiff are found to be as early back as of 1795. According to the reports, these English origin dogs were deployed as night watcher in 1800’s against the poachers. They were trained in such a manner that they remain quiet and as poacher proceeds towards their hunt, they hold them down immediately. Seeing their ability to knock down poachers in night, they were also called Gamekeeper’s Night Dogs. As they are one of the most aggressive dogs of mastiff breeds, it is recommended to raise these mastiffs along with kids so they can get better adaptability with them or otherwise they can show aggressive behavior towards them. As mentioned above mastiffs are usually of large size, an average Bullmastiff is around 24 to 27 inches tall and weighs it around between 100-130 lbs. They have short muzzle and have dense, rough and harsh coat with broad heads and V-shaped ears fallen downwards. They have average life span of around 8 to 10 years.

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What is English Mastiff?

English Mastiff is regarded as one of the largest dog breed worldwide. It is also acknowledged as an ancient dog breed that has even its presence on Egyptian monuments  aging as early as 3000 BC. English Mastiffs are also said to participate along with British soldiers in 55 BC against the Roman legions. They are also refereed as Old English Mastiffs, Even with such a large size and muscular body they are normally seen as a calm nature dog and that is why it is often called a ‘gentle giant’. But this doesn’t makes it less effective guard dog. As a common observation, English Mastiff is said to be a silent guard dog rather than a barker. They are relatively said to be lazy as compare to the other mastiffs but a regular apt exercise makes them perfect fit as a guard dog. An average English Mastiff is around 27.5 to 30 inches tall and weighs it around between 120-200 lbs.  They have average life span of around 10 to 12 years.

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Bullmastiff vs. English Mastiff

  • Bullmastiff was obtained as a result of cross between English Mastiff and Bulldog, whereas English Mastiff is an ancient dog, which fought alongside British soldiers in 55 BC. English Mastiffs are said to be descendant of Alaunts.
  • An average Bullmastiff is around 24 to 27 inches tall and weighs it around between 100-130 lbs, whereas an average English Mastiff is around 27.5 to 30 inches tall and weighs it around between 120-200 lbs.
  • Bullmastiff have average life span of around 8 to 10 years, while English Mastiff have average life span of around 10 to 12 years.
  • Bullmastiff are mote aggressive as compare to the English Mastiffs.

Explanatory Video